فهرست/سیاهه نماد ها/نشانه ها/رموز یاضی

This is a list of symbols found within all branches of mathematics to express a formula or to replace a constant.

When reading the list, it is important to recognize that a mathematical concept is independent of the symbol chosen to represent it. For many of the symbols below, the symbol is usually synonymous with the corresponding concept (ultimately an arbitrary choice made as a result of the cumulative history of mathematics), but in some situations a different convention may be used. For example, depending on context, "≡" may represent congruence or a definition. Further, in mathematical logic, numerical equality is sometimes represented by "≡" instead of "=", with the latter representing equality of well-formed formulas. In short, convention dictates the meaning.

Each symbol is shown both in HTML, whose display depends on the browser's access to an appropriate font installed on the particular device, and in TEX, as an image.

Contents   [hide]  1 Symbols 2 Variations 3 See also 4 References 5 External links

[edit]Symbols

Symbol in HTML	Symbol in TEX	Name	Explanation	Examples
		Read as
		Category
=		equality is equal to; equals everywhere	means  and  represent the same thing or value.
≠		inequality is not equal to; does not equal everywhere	means that  and  do not represent the same thing or value. (The forms !=, /= or <> are generally used in programming languages where ease of typing and use of ASCII text is preferred.)
< >		strict inequality is less than, is greater than order theory	means  is less than .  means  is greater than .
		proper subgroup is a proper subgroup of group theory	means  is a proper subgroup of .
≪ ≫		(very) strict inequality is much less than, is much greater than order theory	x ≪ y means x is much less than y. x ≫ y means x is much greater than y.	0.003 ≪ 1000000
		asymptotic comparison is of smaller order than, is of greater order than analytic number theory	f ≪ g means the growth of f is asymptotically bounded by g. (This is I. M. Vinogradov's notation. Another notation is the Big O notation, which looks like f = O(g).)	x ≪ ex
≤ ≥		inequality is less than or equal to, is greater than or equal to order theory	x ≤ y means x is less than or equal to y. x ≥ y means x is greater than or equal to y. (The forms <= and >= are generally used in programming languages where ease of typing and use of ASCII text is preferred.)	3 ≤ 4 and 5 ≤ 5 5 ≥ 4 and 5 ≥ 5
		subgroup is a subgroup of group theory	H ≤ G means H is a subgroup of G.	Z ≤ Z A3  ≤ S3
		reduction is reducible to computational complexity theory	A ≤ B means the problem A can be reduced to the problem B. Subscripts can be added to the ≤ to indicate what kind of reduction.	If then
≦ ≧		congruence relation ...is less than ... is greater than... modular arithmetic	7k ≡ 28 (mod 2) is only true if k is an even integer. Assume that the problem requires kto be non-negative; the domain is defined as 0 ≦ k ≦ ∞.	10a ≡ 5 (mod 5)   for 1 ≦ a ≦ 10
		vector inequality ... is less than or equal... is greater than or equal... order theory	x ≦ y means that each component of vector x is less than or equal to each corresponding component of vector y. x ≧ y means that each component of vector x is greater than or equal to each corresponding component of vector y. It is important to note that x ≦ y remains true if every element is equal. However, if the operator is changed, x ≤ y is true if and only if x ≠ y is also true.
≺		Karp reduction is Karp reducible to; is polynomial-time many-one reducible to computational complexity theory	L1 ≺ L2 means that the problem L1 is Karp reducible to L2.[1]	If L1 ≺ L2 and L2 ∈ P, then L1 ∈ P.
∝		proportionality is proportional to; varies as everywhere	y ∝ x means that y = kx for some constant k.	if y = 2x, then y ∝ x.
		Karp reduction[2] is Karp reducible to; is polynomial-time many-one reducible to computational complexity theory	A ∝ B means the problem A can be polynomially reduced to the problem B.	If L1 ∝ L2 and L2 ∈ P, then L1 ∈ P.
+		addition plus; add arithmetic	4 + 6 means the sum of 4 and 6.	2 + 7 = 9
		disjoint union the disjoint union of ... and ... set theory	A1 + A2 means the disjoint union of sets A1 and A2.	A1 = {3, 4, 5, 6} ∧ A2 = {7, 8, 9, 10} ⇒ A1 + A2 = {(3,1), (4,1), (5,1), (6,1), (7,2), (8,2), (9,2), (10,2)}
−		subtraction minus; take; subtract arithmetic	9 − 4 means the subtraction of 4 from 9.	8 − 3 = 5
		negative sign negative; minus; the opposite of arithmetic	−3 means the negative of the number 3.	−(−5) = 5
		set-theoretic complement minus; without set theory	A − B means the set that contains all the elements of A that are not in B. (∖ can also be used for set-theoretic complement as described below.)	{1,2,4} − {1,3,4}  =  {2}
±		plus-minus plus or minus arithmetic	6 ± 3 means both 6 + 3 and 6 − 3.	The equation x = 5 ± √4, has two solutions, x = 7 and x = 3.
		plus-minus plus or minus measurement	10 ± 2 or equivalently 10 ± 20% means the range from 10 − 2 to 10 + 2.	If a = 100 ± 1 mm, then a ≥ 99 mm and a ≤ 101 mm.
∓		minus-plus minus or plus arithmetic	6 ± (3 ∓ 5) means both 6 + (3 − 5) and 6 − (3 + 5).	cos(x ± y) = cos(x) cos(y) ∓ sin(x) sin(y).
×		multiplication times; multiplied by arithmetic	3 × 4 means the multiplication of 3 by 4. (The symbol * is generally used in programming languages, where ease of typing and use of ASCII text is preferred.)	7 × 8 = 56
		Cartesian product the Cartesian product of ... and ...; the direct product of ... and ... set theory	X×Y means the set of all ordered pairs with the first element of each pair selected from X and the second element selected from Y.	{1,2} × {3,4} = {(1,3),(1,4),(2,3),(2,4)}
		cross product cross linear algebra	u × v means the cross product of vectors u and v	(1,2,5) × (3,4,−1) = (−22, 16, − 2)
		group of units the group of units of ring theory	R× consists of the set of units of the ring R, along with the operation of multiplication. This may also be written R* as described below, or U(R).
*		multiplication times; multiplied by arithmetic	a * b means the product of a and b. (Multiplication can also be denoted with × or ⋅, or even simple juxtaposition. * is generally used where ease of typing and use of ASCII text is preferred, such as programming languages.)	4 * 3 means the product of 4 and 3, or 12.
		convolution convolution; convolved with functional analysis	f * g means the convolution of f and g.	.
		complex conjugate conjugate complex numbers	z* means the complex conjugate of z. ( can also be used for the conjugate of z, as described below.)	.
		group of units the group of units of ring theory	R* consists of the set of units of the ring R, along with the operation of multiplication. This may also be written R× as described above, or U(R).
		hyperreal numbers the (set of) hyperreals non-standard analysis	*R means the set of hyperreal numbers. Other sets can be used in place of R.	*N is the hypernatural numbers.
		Hodge dual Hodge dual; Hodge star linear algebra	*v means the Hodge dual of a vector v. If v is a k-vector within an n-dimensionaloriented inner product space, then *v is an (n−k)-vector.	If  are the standard basis vectors of ,
·		multiplication times; multiplied by arithmetic	3 · 4 means the multiplication of 3 by 4.	7 · 8 = 56
		dot product dot linear algebra	u · v means the dot product of vectors u and v	(1,2,5) · (3,4,−1) = 6
		placeholder (silent) functional analysis	A   ·   means a placeholder for an argument of a function. Indicates the functional nature of an expression without assigning a specific symbol for an argument.
⊗		tensor product, tensor product of modules tensor product of linear algebra	means the tensor product of V and U.[3]  means the tensor product of modules V and U over the ring R.	{1, 2, 3, 4} ⊗ {1, 1, 2} = {{1, 2, 3, 4}, {1, 2, 3, 4}, {2, 4, 6, 8}}
		Kulkarni–Nomizu product Kulkarni–Nomizu product tensor algebra	Derived from the tensor product of two symmetric type (0,2) tensors; it has the algebraic symmetries of the Riemann tensor.  has components .
÷ ⁄		division (Obelus) divided by; over arithmetic	6 ÷ 3 or 6 ⁄ 3 means the division of 6 by 3.	2 ÷ 4 = 0.5 12 ⁄ 4 = 3
		quotient group mod group theory	G / H means the quotient of group G modulo its subgroup H.	{0, a, 2a, b, b+a, b+2a} / {0, b} = {{0, b}, {a, b+a}, {2a, b+2a}}
		quotient set mod set theory	A/~ means the set of all ~ equivalence classes in A.	If we define ~ by x ~ y ⇔ x − y ∈ ℤ, then ℝ/~ = { {x + n : n ∈ ℤ } : x ∈ [0,1) }
√		square root the (principal) square root of real numbers	means the nonnegative number whose square is .
		complex square root the (complex) square root of complex numbers	if  is represented in polar coordinates with , then .
x		mean overbar; … bar statistics	(often read as “x bar”) is the mean (average value of ).	.
		complex conjugate conjugate complex numbers	means the complex conjugate of z. (z* can also be used for the conjugate of z, as described above.)	.
		finite sequence, tuple finite sequence, tuple model theory	means the finite sequence/tuple .	.
		algebraic closure algebraic closure of field theory	is the algebraic closure of the field F.	The field of algebraic numbers is sometimes denoted as  because it is the algebraic closure of therational numbers .
		topological closure (topological) closure of topology	is the topological closure of the set S. This may also be denoted as cl(S) or Cl(S).	In the space of the real numbers,  (the rational numbers are dense in the real numbers).
â		unit vector hat geometry	(pronounced "a hat") is the normalized version of vector , having length 1.
|…|		absolute value; modulus absolute value of; modulus of numbers	|x| means the distance along the real line (or across the complex plane) between x andzero.	|3| = 3 |–5| = |5| = 5 | i | = 1 | 3 + 4i | = 5
		Euclidean norm or Euclidean length or magnitude Euclidean norm of geometry	|x| means the (Euclidean) length of vector x.	For x = (3,-4)
		determinant determinant of matrix theory	|A| means the determinant of the matrix A
		cardinality cardinality of; size of; order of set theory	|X| means the cardinality of the set X. (# may be used instead as described below.)	|{3, 5, 7, 9}| = 4.
||…||		norm norm of; length of linear algebra	|| x || means the norm of the element x of a normed vector space.[4]	|| x  + y || ≤  || x ||  +  || y ||
		nearest integer function nearest integer to numbers	||x|| means the nearest integer to x. (This may also be written [x], ⌊x⌉, nint(x) or Round(x).)	||1|| = 1, ||1.6|| = 2, ||−2.4|| = −2, ||3.49|| = 3
∣ ∤		divisor, divides divides number theory	a|b means a divides b. a∤b means a does not divide b. (This symbol can be difficult to type, and its negation is rare, so a regular but slightly shorter vertical bar | character can be used.)	Since 15 = 3×5, it is true that 3|15 and 5|15.
		conditional probability given probability	P(A|B) means the probability of the event a occurring given that b occurs.	if X is a uniformly random day of the year P(X is May 25 | X is in May) = 1/31
		restriction restriction of … to …; restricted to set theory	f|A means the function f restricted to the set A, that is, it is the function with domainA ∩ dom(f) that agrees with f.	The function f : R → R defined by f(x) = x2 is not injective, but f|R+ is injective.
		such that such that; so that everywhere	| means “such that”, see ":" (described below).	S = {(x,y) | 0 < y < f(x)} The set of (x,y) such that y is greater than 0 and less than f(x).
||		parallel is parallel to geometry	x || y means x is parallel to y.	If l || m and m ⊥ n then l ⊥ n.
		incomparability is incomparable to order theory	x || y means x is incomparable to y.	{1,2} || {2,3} under set containment.
		exact divisibility exactly divides number theory	pa || n means pa exactly divides n (i.e. pa divides n but pa+1 does not).	23 || 360.
#		cardinality cardinality of; size of; order of set theory	#X means the cardinality of the set X. (|…| may be used instead as described above.)	#{4, 6, 8} = 3
		connected sum connected sum of; knot sum of; knot composition of topology, knot theory	A#B is the connected sum of the manifolds A and B. If A and B are knots, then this denotes the knot sum, which has a slightly stronger condition.	A#Sm is homeomorphic to A, for any manifold A, and the sphere Sm.
		primorial primorial number theory	n# is product of all prime numbers less than or equal to n.	12# = 2 × 3 × 5 × 7 × 11 = 2310
ℵ		aleph number aleph set theory	ℵα represents an infinite cardinality (specifically, the α-th one, where α is an ordinal).	|ℕ| = ℵ0, which is called aleph-null.
ℶ		beth number beth set theory	ℶα represents an infinite cardinality (similar to ℵ, but ℶ does not necessarily index all of the numbers indexed by ℵ. ).
𝔠		cardinality of the continuum cardinality of the continuum; c; cardinality of the real numbers set theory	The cardinality of  is denoted by  or by the symbol  (a lowercase Fraktur letter C).
:		such that such that; so that everywhere	: means “such that”, and is used in proofs and the set-builder notation (described below).	∃ n ∈ ℕ: n is even.
		field extension extends; over field theory	K : F means the field K extends the field F. This may also be written as K ≥ F.	ℝ : ℚ
		inner product of matrices inner product of linear algebra	A : B means the Frobenius inner product of the matrices A and B. The general inner product is denoted by ⟨u, v⟩, ⟨u | v⟩ or (u | v), as described below. For spatial vectors, the dot product notation, x·y is common. See also Bra-ket notation.
		index of a subgroup index of subgroup group theory	The index of a subgroup H in a group G is the "relative size" of H in G: equivalently, the number of "copies" (cosets) of H that fill up G
!		logical negation not propositional logic	The statement !A is true if and only if A is false. A slash placed through another operator is the same as "!" placed in front. (The symbol ! is primarily from computer science. It is avoided in mathematical texts, where the notation ¬A is preferred.)	!(!A) ⇔ A x ≠ y  ⇔  !(x = y)
		factorial factorial combinatorics	n! means the product 1 × 2 × ... × n.
		combination; binomial coefficent n choose k combinatorics	means (in the case of n = positive integer) the number of combinations of k elements drawn from a set of n elements. (This may also be written as C(n, k), nCk or nCk.)
		multiset coefficient u multichoose k combinatorics	(when u is positive integer) means reverse or rising binomial coefficient.
~		probability distribution has distribution statistics	X ~ D, means the random variable X has the probability distribution D.	X ~ N(0,1), the standard normal distribution
		row equivalence is row equivalent to matrix theory	A~B means that B can be generated by using a series of elementary row operations onA
		same order of magnitude roughly similar; poorly approximates approximation theory	m ~ n means the quantities m and n have the same order of magnitude, or general size. (Note that ~ is used for an approximation that is poor, otherwise use ≈ .)	2 ~ 5 8 × 9 ~ 100 but π2 ≈ 10
		asymptotically equivalent is asymptotically equivalent to asymptotic analysis	f ~ g means .	x ~ x+1
		equivalence relation are in the same equivalence class everywhere	a ~ b means  (and equivalently ).	1 ~ 5 mod 4
≈		approximately equal is approximately equal to everywhere	x ≈ y means x is approximately equal to y. This may also be written ≃, ≅, ~, ♎ (Libra Symbol), or ≒.	π ≈ 3.14159
		isomorphism is isomorphic to group theory	G ≈ H means that group G is isomorphic (structurally identical) to group H. (≅ can also be used for isomorphic, as described below.)	Q / {1, −1} ≈ V, where Q is the quaternion group and V is the Klein four-group.
≀		wreath product wreath product of … by … group theory	A ≀ H means the wreath product of the group A by the group H. This may also be written A wr H.	is isomorphic to the automorphism group of the complete bipartite graph on (n,n) vertices.
◅ ▻		normal subgroup is a normal subgroup of group theory	N ◅ G means that N is a normal subgroup of group G.	Z(G) ◅ G
		ideal is an ideal of ring theory	I ◅ R means that I is an ideal of ring R.	(2) ◅ Z
		antijoin the antijoin of relational algebra	R ▻ S means the antijoin of the relations R and S, the tuples in R for which there is not a tuple in S that is equal on their common attribute names.	R  S = R - R  S
⋉ ⋊		semidirect product the semidirect product of group theory	N ⋊φ H is the semidirect product of N (a normal subgroup) and H (a subgroup), with respect to φ. Also, if G = N ⋊φ H, then G is said to split over N. (⋊ may also be written the other way round, as ⋉, or as ×.)
		semijoin the semijoin of relational algebra	R ⋉ S is the semijoin of the relations R and S, the set of all tuples in R for which there is a tuple in S that is equal on their common attribute names.	R  S = a1,..,an(R  S)
⋈		natural join the natural join of relational algebra	R ⋈ S is the natural join of the relations R and S, the set of all combinations of tuples inR and S that are equal on their common attribute names.
∴		therefore therefore; so; hence everywhere	Sometimes used in proofs before logical consequences.	All humans are mortal. Socrates is a human. ∴ Socrates is mortal.
∵		because because; since everywhere	Sometimes used in proofs before reasoning.	11 is prime ∵ it has no positive integer factors other than itself and one.
■ □ ∎ ▮ ‣		end of proof QED; tombstone; Halmos symbol everywhere	Used to mark the end of a proof. (May also be written Q.E.D.)
		D'Alembertian non-Euclidean Laplacian vector calculus	It is the generalisation of the Laplace operator in the sense that it is the differential operator which is invariant under the isometry group of the underlying space and it reduces to the Laplace operator if restricted to time independent functions.
⇒ → ⊃		material implication implies; if … then propositional logic, Heyting algebra	A ⇒ B means if A is true then B is also true; if A is false then nothing is said about B. (→ may mean the same as ⇒, or it may have the meaning for functions given below.) (⊃ may mean the same as ⇒,[5] or it may have the meaning for superset given below.)	x = 2  ⇒  x2 = 4 is true, but x2 = 4   ⇒  x = 2 is in general false (since x could be −2).
⇔ ↔		material equivalence if and only if; iff propositional logic	A ⇔ B means A is true if B is true and A is false if B is false.	x + 5 = y + 2  ⇔  x + 3 = y
¬ ˜		logical negation not propositional logic	The statement ¬A is true if and only if A is false. A slash placed through another operator is the same as "¬" placed in front. (The symbol ~ has many other uses, so ¬ or the slash notation is preferred. Computer scientists will often use ! but this is avoided in mathematical texts.)	¬(¬A) ⇔ A x ≠ y  ⇔  ¬(x =  y)
∧		logical conjunction or meetin a lattice and; min; meet propositional logic, lattice theory	The statement A ∧ B is true if A and B are both true; else it is false. For functions A(x) and B(x), A(x) ∧ B(x) is used to mean min(A(x), B(x)).	n < 4  ∧  n >2  ⇔  n = 3 when n is a natural number.
		wedge product wedge product; exterior product exterior algebra	u ∧ v means the wedge product of any multivectors u and v. In three dimensionalEuclidean space the wedge product and the cross product of two vectors are each other's Hodge dual.
		exponentiation … (raised) to the power of … everywhere	a ^ b means a raised to the power of b (a ^ b is more commonly written ab. The symbol ^ is generally used in programming languages where ease of typing and use of plain ASCII text is preferred.)	2^3 = 23 = 8
∨		logical disjunction or join in a lattice or; max; join propositional logic, lattice theory	The statement A ∨ B is true if A or B (or both) are true; if both are false, the statement is false. For functions A(x) and B(x), A(x) ∨ B(x) is used to mean max(A(x), B(x)).	n ≥ 4  ∨  n ≤ 2  ⇔ n ≠ 3 when n is a natural number.
⊕ ⊻		exclusive or xor propositional logic,Boolean algebra	The statement A ⊕ B is true when either A or B, but not both, are true. A ⊻ B means the same.	(¬A) ⊕ A is always true, A ⊕ A is always false.
		direct sum direct sum of abstract algebra	The direct sum is a special way of combining several objects into one general object. (The bun symbol ⊕, or the coproduct symbol ∐, is used; ⊻ is only for logic.)	Most commonly, for vector spaces U, V, and W, the following consequence is used: U = V ⊕ W ⇔ (U = V + W) ∧ (V ∩ W = {0})
∀		universal quantification for all; for any; for each predicate logic	∀ x: P(x) means P(x) is true for all x.	∀ n ∈ ℕ: n2 ≥ n.
∃		existential quantification there exists; there is; there are predicate logic	∃ x: P(x) means there is at least one x such that P(x) is true.	∃ n ∈ ℕ: n is even.
∃!		uniqueness quantification there exists exactly one predicate logic	∃! x: P(x) means there is exactly one x such that P(x) is true.	∃! n ∈ ℕ: n + 5 = 2n.
=: := ≡ :⇔ ≜ ≝ ≐		definition is defined as; is equal by definition to everywhere	x := y, y =: x or x ≡ y means x is defined to be another name for y, under certain assumptions taken in context. (Some writers use ≡ to mean congruence). P :⇔ Q means P is defined to be logically equivalent to Q.
≅		congruence is congruent to geometry	△ABC ≅ △DEF means triangle ABC is congruent to (has the same measurements as) triangle DEF.
		isomorphic is isomorphic to abstract algebra	G ≅ H means that group G is isomorphic (structurally identical) to group H. (≈ can also be used for isomorphic, as described above.)	.
≡		congruence relation ... is congruent to ... modulo ... modular arithmetic	a ≡ b (mod n) means a − b is divisible by n	5 ≡ 2 (mod 3)
{ , }		set brackets the set of … set theory	{a,b,c} means the set consisting of a, b, and c.[6]	ℕ = { 1, 2, 3, …}
{ : } { | } { ; }		set builder notation the set of … such that set theory	{x : P(x)} means the set of all x for which P(x) is true.[6] {x | P(x)} is the same as {x : P(x)}.	{n ∈ ℕ : n2 < 20} = { 1, 2, 3, 4}
∅ { }		empty set the empty set set theory	∅ means the set with no elements.[6] { } means the same.	{n ∈ ℕ : 1 < n2 < 4} = ∅
∈ ∉		set membership is an element of; is not an element of everywhere, set theory	a ∈ S means a is an element of the set S;[6] a ∉ S means a is not an element of S.[6]	(1/2)−1 ∈ ℕ 2−1 ∉ ℕ
∋		such that symbol such that mathematical logic	often abbreviated as "s.t."; : and | are also used to abbreviate "such that". The use of ∋goes back to early mathematical logic and its usage in this sense is declining.	Choose  ∋ 2| and 3|. (Here | is used in the sense of "divides".)
		set membership contains as an element set theory	S∋ means the same thing as ∈S, where S is a set and  is an element of S.
∌		set membership does not contain as an element set theory	S∌ means the same thing as ∉S, where S is a set and  is not an element of S.
⊆ ⊂		subset is a subset of set theory	(subset) A ⊆ B means every element of A is also an element of B.[7] (proper subset) A ⊂ B means A ⊆ B but A ≠ B. (Some writers use the symbol ⊂ as if it were the same as ⊆.)	(A ∩ B) ⊆ A ℕ ⊂ ℚ ℚ ⊂ ℝ
⊇ ⊃		superset is a superset of set theory	A ⊇ B means every element of B is also an element of A. A ⊃ B means A ⊇ B but A ≠ B. (Some writers use the symbol ⊃ as if it were the same as ⊇.)	(A ∪ B) ⊇ B ℝ ⊃ ℚ
∪		set-theoretic union the union of … or …; union set theory	A ∪ B means the set of those elements which are either in A, or in B, or in both.[7]	A ⊆ B  ⇔  (A ∪ B) = B
∩		set-theoretic intersection intersected with; intersect set theory	A ∩ B means the set that contains all those elements that A and B have in common.[7]	{x ∈ ℝ : x2 = 1} ∩ ℕ = {1}
∆		symmetric difference symmetric difference set theory	A ∆ B means the set of elements in exactly one of A or B. (Not to be confused with delta, Δ, described below.)	{1,5,6,8} ∆ {2,5,8} = {1,2,6}
∖		set-theoretic complement minus; without set theory	A ∖ B means the set that contains all those elements of A that are not in B.[7] (− can also be used for set-theoretic complement as described above.)	{1,2,3,4} ∖ {3,4,5,6} = {1,2}
→		function arrow from … to set theory, type theory	f: X → Y means the function f maps the set X into the set Y.	Let f: ℤ → ℕ∪{0} be defined by f(x) := x2.
↦		function arrow maps to set theory	f: a ↦ b means the function f maps the element a to the element b.	Let f: x ↦ x+1 (the successor function).
∘		function composition composed with set theory	f∘g is the function, such that (f∘g)(x) = f(g(x)).[8]	if f(x) := 2x, and g(x) := x + 3, then (f∘g)(x) = 2(x + 3).
o		Hadamard product entrywise product linear algebra	For two matrices (or vectors) of the same dimensions  the Hadamard product is a matrix of the same dimensions  with elements given by . This is often used in matrix based programming such as MATLAB where the operation is done by A.*B
ℕ N		natural numbers N; the (set of) natural numbers numbers	N means either { 0, 1, 2, 3, ...} or { 1, 2, 3, ...}. The choice depends on the area of mathematics being studied; e.g. number theoristsprefer the latter; analysts, set theorists and computer scientists prefer the former. To avoid confusion, always check an author's definition of N. Set theorists often use the notation ω (for least infinite ordinal) to denote the set of natural numbers (including zero), along with the standard ordering relation ≤.	ℕ = {|a| : a ∈ ℤ} or ℕ = {|a| > 0: a ∈ ℤ}
ℤ Z		integers Z; the (set of) integers numbers	ℤ means {..., −3, −2, −1, 0, 1, 2, 3, ...}. ℤ+ or ℤ> means {1, 2, 3, ...} . ℤ* or ℤ≥ means {0, 1, 2, 3, ...} .	ℤ = {p, −p : p ∈ ℕ ∪ {0}​}
ℤn ℤp Zn Zp		integers mod n Zn; the (set of) integers modulon numbers	ℤn means {[0], [1], [2], ...[n−1]} with addition and multiplication modulo n. Note that any letter may be used instead of n, such as p. To avoid confusion with p-adic numbers, use ℤ/pℤ or ℤ/(p) instead.	ℤ3 = {[0], [1], [2]}
		p-adic integers the (set of) p-adic integers numbers	Note that any letter may be used instead of p, such as n or l.
ℙ P		projective space P; the projective space; the projective line; the projective plane topology	ℙ means a space with a point at infinity.	,
		probability the probability of probability theory	ℙ(X) means the probability of the event X occurring. This may also be written as P(X), Pr(X), P[X] or Pr[X].	If a fair coin is flipped, ℙ(Heads) = ℙ(Tails) = 0.5.
ℚ Q		rational numbers Q; the (set of) rational numbers; the rationals numbers	ℚ means {p/q : p ∈ ℤ, q ∈ ℕ}.	3.14000... ∈ ℚ π ∉ ℚ
ℝ R		real numbers R; the (set of) real numbers; the reals numbers	ℝ means the set of real numbers.	π ∈ ℝ √(−1) ∉ ℝ
ℂ C		complex numbers C; the (set of) complex numbers numbers	ℂ means {a + b i : a,b ∈ ℝ}.	i = √(−1) ∈ ℂ
ℍ H		quaternions or Hamiltonian quaternions H; the (set of) quaternions numbers	ℍ means {a + b i + c j + d k : a,b,c,d ∈ ℝ}.
O		Big O notation big-oh of Computational complexity theory	The Big O notation describes the limiting behavior of a function, when the argument tends towards a particular value or infinity.	If f(x) = 6x4 − 2x3 + 5 and g(x) = x4 , then
∞		infinity infinity numbers	∞ is an element of the extended number line that is greater than all real numbers; it often occurs in limits.
⌊…⌋		floor floor; greatest integer; entier numbers	⌊x⌋ means the floor of x, i.e. the largest integer less than or equal to x. (This may also be written [x], floor(x) or int(x).)	⌊4⌋ = 4, ⌊2.1⌋ = 2, ⌊2.9⌋ = 2, ⌊−2.6⌋ = −3
⌈…⌉		ceiling ceiling numbers	⌈x⌉ means the ceiling of x, i.e. the smallest integer greater than or equal to x. (This may also be written ceil(x) or ceiling(x).)	⌈4⌉ = 4, ⌈2.1⌉ = 3, ⌈2.9⌉ = 3, ⌈−2.6⌉ = −2
⌊…⌉		nearest integer function nearest integer to numbers	⌊x⌉ means the nearest integer to x. (This may also be written [x], ||x||, nint(x) or Round(x).)	⌊2⌉ = 2, ⌊2.6⌉ = 3, ⌊-3.4⌉ = -3, ⌊4.49⌉ = 4
[ : ]		degree of a field extension the degree of field theory	[K : F] means the degree of the extension K : F.	[ℚ(√2) : ℚ] = 2 [ℂ : ℝ] = 2 [ℝ : ℚ] = ∞
[ ] [ , ] [ , , ]		equivalence class the equivalence class of abstract algebra	[a] means the equivalence class of a, i.e. {x : x ~ a}, where ~ is an equivalence relation. [a]R means the same, but with R as the equivalence relation.	Let a ~ b be true iff a ≡ b (mod 5). Then [2] = {…, −8, −3, 2, 7, …}.
		floor floor; greatest integer; entier numbers	[x] means the floor of x, i.e. the largest integer less than or equal to x. (This may also be written ⌊x⌋, floor(x) or int(x). Not to be confused with the nearest integer function, as described below.)	[3] = 3, [3.5] = 3, [3.99] = 3, [−3.7] = −4
		nearest integer function nearest integer to numbers	[x] means the nearest integer to x. (This may also be written ⌊x⌉, ||x||, nint(x) or Round(x). Not to be confused with the floor function, as described above.)	[2] = 2, [2.6] = 3, [-3.4] = -3, [4.49] = 4
		Iverson bracket 1 if true, 0 otherwise propositional logic	[S] maps a true statement S to 1 and a false statement S to 0.	[0=5]=0, [7>0]=1, [2 ∈ {2,3,4}]=1, [5 ∈ {2,3,4}]=0
		image image of … under … everywhere	f[X] means { f(x) : x ∈ X }, the image of the function f under the set X ⊆ dom(f). (This may also be written as f(X) if there is no risk of confusing the image of f under Xwith the function application f of X. Another notation is Im f, the image of f under its domain.)
		closed interval closed interval order theory	.	0 and 1/2 are in the interval [0,1].
		commutator the commutator of group theory, ring theory	[g, h] = g−1h−1gh (or ghg−1h−1), if g, h ∈ G (a group). [a, b] = ab − ba, if a, b ∈ R (a ring or commutative algebra).	xy = x[x, y] (group theory). [AB, C] = A[B, C] + [A, C]B (ring theory).
		triple scalar product the triple scalar product of vector calculus	[a, b, c] = a × b · c, the scalar product of a × b with c.	[a, b, c] = [b, c, a] = [c, a, b].
( ) ( , )		function application of set theory	f(x) means the value of the function f at the element x.	If f(x) := x2, then f(3) = 32 = 9.
		image image of … under … everywhere	f(X) means { f(x) : x ∈ X }, the image of the function f under the set X ⊆ dom(f). (This may also be written as f[X] if there is a risk of confusing the image of f under Xwith the function application f of X. Another notation is Im f, the image of f under its domain.)
		precedence grouping parentheses everywhere	Perform the operations inside the parentheses first.	(8/4)/2 = 2/2 = 1, but 8/(4/2) = 8/2 = 4.
		tuple tuple; n-tuple; ordered pair/triple/etc; row vector; sequence everywhere	An ordered list (or sequence, or horizontal vector, or row vector) of values. (Note that the notation (a,b) is ambiguous: it could be an ordered pair or an open interval. Set theorists and computer scientists often use angle brackets ⟨ ⟩ instead of parentheses.)	(a, b) is an ordered pair (or 2-tuple). (a, b, c) is an ordered triple (or 3-tuple). ( ) is the empty tuple (or 0-tuple).
		highest common factor highest common factor; greatest common divisor; hcf; gcd number theory	(a, b) means the highest common factor of a and b. (This may also be written hcf(a, b) or gcd(a, b).)	(3, 7) = 1 (they are coprime); (15, 25) = 5.
( , ) ] , [		open interval open interval order theory	. (Note that the notation (a,b) is ambiguous: it could be an ordered pair or an open interval. The notation ]a,b[ can be used instead.)	4 is not in the interval (4, 18). (0, +∞) equals the set of positive real numbers.
( , ] ] , ]		left-open interval half-open interval; left-open interval order theory	.	(−1, 7] and (−∞, −1]
[ , ) [ , [		right-open interval half-open interval; right-open interval order theory	.	[4, 18) and [1, +∞)
⟨⟩ ⟨,⟩		inner product inner product of linear algebra	⟨u,v⟩ means the inner product of u and v, where u and v are members of an inner product space. Note that the notation ⟨u, v⟩ may be ambiguous: it could mean the inner product or thelinear span. There are many variants of the notation, such as ⟨u | v⟩ and (u | v), which are described below. For spatial vectors, the dot product notation, x·y is common. For matrices, the colon notation A : B may be used. As ⟨ and ⟩ can be hard to type, the more “keyboard friendly” forms < and > are sometimes seen. These are avoided in mathematical texts.	The standard inner product between two vectors x = (2, 3) and y = (−1, 5) is: ⟨x, y⟩ = 2 × −1 + 3 × 5 = 13
		average average of statistics	let S be a subset of N for example,  represents the average of all the element in S.	for a time series :g(t) (t = 1, 2,...) we can define the structure functions Sq():
		linear span (linear) span of; linear hull of linear algebra	⟨S⟩ means the span of S ⊆ V. That is, it is the intersection of all subspaces of Vwhich contain S. ⟨u1, u2, …⟩is shorthand for ⟨{u1, u2, …}⟩. Note that the notation ⟨u, v⟩ may be ambiguous: it could mean the inner product or the linear span. The span of S may also be written as Sp(S).	.
		subgroup generated by a set the subgroup generated by group theory	means the smallest subgroup of G (where S ⊆ G, a group) containing every element of S.  is shorthand for .	In S3,  and .
		tuple tuple; n-tuple; ordered pair/triple/etc; row vector; sequence everywhere	An ordered list (or sequence, or horizontal vector, or row vector) of values. (The notation (a,b) is often used as well.)	is an ordered pair (or 2-tuple).  is an ordered triple (or 3-tuple).  is the empty tuple (or 0-tuple).
⟨|⟩ (|)		inner product inner product of linear algebra	⟨u | v⟩ means the inner product of u and v, where u and v are members of an inner product space.[9] (u | v) means the same. Another variant of the notation is ⟨u, v⟩ which is described above. For spatial vectors, the dot product notation, x·y is common. For matrices, the colon notation A : B may be used. As ⟨ and ⟩ can be hard to type, the more “keyboard friendly” forms < and > are sometimes seen. These are avoided in mathematical texts.
|⟩		ket vector the ket …; the vector … Dirac notation	|φ⟩ means the vector with label φ, which is in a Hilbert space.	A qubit's state can be represented as α|0⟩+ β|1⟩, where α and β are complex numbers s.t. |α|2 + |β|2 = 1.
⟨|		bra vector the bra …; the dual of … Dirac notation	⟨φ| means the dual of the vector |φ⟩, a linear functional which maps a ket |ψ⟩ onto the inner product ⟨φ|ψ⟩.
∑		summation sum over … from … to … of arithmetic	means .
∏		product product over … from … to … of arithmetic	means .
		Cartesian product the Cartesian product of; the direct product of set theory	means the set of all (n+1)-tuples (y0, …, yn).
∐		coproduct coproduct over … from … to … of category theory	A general construction which subsumes the disjoint union of sets and of topological spaces, the free product of groups, and the direct sum of modules and vector spaces. The coproduct of a family of objects is essentially the "least specific" object to which each object in the family admits a morphism.
Δ		delta delta; change in calculus	Δx means a (non-infinitesimal) change in x. (If the change becomes infinitesimal, δ and even d are used instead. Not to be confused with the symmetric difference, written ∆, above.)	is the gradient of a straight line
		Laplacian Laplace operator vector calculus	The Laplace operator is a second order differential operator in n-dimensionalEuclidean space	If ƒ is a twice-differentiable real-valued function, then the Laplacian of ƒ is defined by
δ		Dirac delta function Dirac delta of hyperfunction		δ(x)
		Kronecker delta Kronecker delta of hyperfunction		δij
		Functional derivative Functional derivative of Differential operators
∂		partial derivative partial; d calculus	∂f/∂xi means the partial derivative of f with respect to xi, where f is a function on (x1, …,xn).	If f(x,y) := x2y, then ∂f/∂x = 2xy
		boundary boundary of topology	∂M means the boundary of M	∂{x : ||x|| ≤ 2} = {x : ||x|| = 2}
		degree of a polynomial degree of algebra	∂f means the degree of the polynomial f. (This may also be written deg f.)	∂(x2 − 1) = 2
∇		gradient del; nabla; gradient of vector calculus	∇f (x1, …, xn) is the vector of partial derivatives (∂f / ∂x1, …, ∂f / ∂xn).	If f (x,y,z) := 3xy + z², then ∇f = (3y, 3x, 2z)
		divergence del dot; divergence of vector calculus		If , then .
		curl curl of vector calculus		If , then .
′		derivative … prime; derivative of calculus	f ′(x) means the derivative of the function f at the point x, i.e., the slope of the tangent to fat x. (The single-quote character ' is sometimes used instead, especially in ASCII text.)	If f(x) := x2, then f ′(x) = 2x
•		derivative … dot; time derivative of calculus	means the derivative of x with respect to time. That is .	If x(t) := t2, then .
∫		indefinite integral orantiderivative indefinite integral of the antiderivative of calculus	∫ f(x) dx means a function whose derivative is f.	∫x2 dx = x3/3 + C
		definite integral integral from … to … of … with respect to calculus	∫ab f(x) dx means the signed area between the x-axis and the graph of the function fbetween x = a and x = b.
		line integral line/ path/ curve/ integral of… along… calculus	∫C f ds means the integral of f along the curve C, , where r is a parametrization of C. (If the curve is closed, the symbol ∮ may be used instead, as described below.)
∮		Contour integral; closed line integral contour integral of calculus	Similar to the integral, but used to denote a single integration over a closed curve or loop. It is sometimes used in physics texts involving equations regarding Gauss's Law, and while these formulas involve a closed surface integral, the representations describe only the first integration of the volume over the enclosing surface. Instances where the latter requires simultaneous double integration, the symbol ∯ would be more appropriate. A third related symbol is the closed volume integral, denoted by the symbol ∰. The contour integral can also frequently be found with a subscript capital letter C, ∮C, denoting that a closed loop integral is, in fact, around a contour C, or sometimes dually appropriately, a circle C. In representations of Gauss's Law, a subscript capital S, ∮S, is used to denote that the integration is over a closed surface.	If C is a Jordan curve about 0, then .
π		projection Projection of relational algebra	restricts  to the  attribute set.
		Pi pi; 3.1415926; ≈22÷7 mathematical constant	Used in various formulas involving circles; π is equivalent to the amount of area a circle would take up in a square of equal width with an area of 4 square units, roughly 3.14/4. It is also the ratio of the circumference to the diameter of a circle.	A=πR2=314.16→R=10
σ		selection Selection of relational algebra	The selection  selects all those tuples in  for which  holds between the and the  attribute. The selection  selects all those tuples in  for which holds between the  attribute and the value .
<: br=""> <·		cover is covered by order theory	x <• y means that x is covered by y.	{1, 8} <• {1, 3, 8} among the subsets of {1, 2, …, 10} ordered by containment.
		subtype is a subtype of type theory	T1 <: i="" nbsp="">T

₂ means that T₁ is a subtype of T₂.If S <: i="" nbsp="">T and T <: i="" nbsp="">U then S <: i="" nbsp="">U (transitivity).

^†

conjugate transpose

conjugate transpose;
adjoint;
Hermitian adjoint/conjugate/transpose

matrix operations

A^† means the transpose of the complex conjugate of A.^[10]

This may also be written A^*T, A^T*, A^*, A^T or A^T.If A = (a_ij) then A^† = (a_ji).

^T

transpose

transpose

matrix operations

A^T means A, but with its rows swapped for columns.

This may also be written A^', A^t or A^tr.If A = (a_ij) then A^T = (a_ji).

⊤

top element

the top element

lattice theory

⊤ means the largest element of a lattice.∀x : x ∨ ⊤ = ⊤

top type

the top type; top

type theory

⊤ means the top or universal type; every type in the type system of interest is a subtype of top.∀ types T, T <: td="">

⊥

perpendicular

is perpendicular to

geometry

x ⊥ y means x is perpendicular to y; or more generally x is orthogonal to y.If l ⊥ m and m ⊥ n in the plane, then l || n.

orthogonal complement

orthogonal/ perpendicular complement of;
perp

linear algebra

W^⊥ means the orthogonal complement of W (where W is a subspace of the inner product space V), the set of all vectors in V orthogonal to every vector in W.Within , .

coprime

is coprime to

number theory

x ⊥ y means x has no factor greater than 1 in common with y.34  ⊥  55.

independent

is independent of

probability

A ⊥ B means A is an event whose probability is independent of event B.If A ⊥ B, then P(A|B) = P(A).

bottom element

the bottom element

lattice theory

⊥ means the smallest element of a lattice.∀x : x ∧ ⊥ = ⊥

bottom type

the bottom type;
bot

type theory

⊥ means the bottom type (a.k.a. the zero type or empty type); bottom is the subtype of every type in the type system.∀ types T, ⊥ <: i="" nbsp="">T

comparability

is comparable to

order theory

x ⊥ y means that x is comparable to y.{e, π} ⊥ {1, 2, e, 3, π} under set containment.

⊧

entailment

entails

model theory

A ⊧ B means the sentence A entails the sentence B, that is in every model in which A is true, B is also true.A ⊧ A ∨ ¬A

⊢

inference

infers;
is derived from

propositional logic,predicate logic

x ⊢ y means y is derivable from x.A → B ⊢ ¬B → ¬A.

partition

is a partition of

number theory

p ⊢ n means that p is a partition of n.(4,3,1,1)  ⊢  9, .

vertical ellipsis

vertical ellipsis

everywhere

Denotes that certain constants and terms are missing out (e.g. for clarity) and that only the important terms are being listed.

[edit]Variations

In mathematics written in Arabic, some symbols may be reversed to make right-to-left writing and reading easier.^[11]

[edit]See also

• Greek letters used in mathematics, science, and engineering
• Mathematical operators and symbols in Unicode
• ISO 31-11 (Mathematical signs and symbols for use in physical sciences and technology)
• List of mathematical abbreviations
• Mathematical alphanumeric symbols
• Mathematical notation
• Notation in probability and statistics
• Physical constants
• Latin letters used in mathematics
• Table of logic symbols
• Table of mathematical symbols by introduction date

[edit]References

1. ^ Rónyai, Lajos (1998), Algoritmusok(Algorithms), TYPOTEX, ISBN 963-9132-16-0
2. ^ Berman, Kenneth A; Paul, Jerome L. (2005), Algorithms: Sequential, Parallel, and Distributed, Boston: Course Technology, p. 822, ISBN 0-534-42057-5
3. ^ Nielsen, Michael A; Chuang, Isaac L (2000), Quantum Computation and Quantum Information, New York: Cambridge University Press, pp. 71–72, ISBN 0-521-63503-9, OCLC 43641333
4. ^ Nielsen, Michael A; Chuang, Isaac L (2000), Quantum Computation and Quantum Information, New York: Cambridge University Press, p. 66, ISBN 0-521-63503-9, OCLC 43641333
5. ^ Copi, Irving M.; Cohen, Carl (1990) [1953], "Chapter 8.3: Conditional Statements and Material Implication", Introduction to Logic (8th ed.),New York: Macmillan, pp. 268–269, ISBN 0-02-325035-6, LCCN 8937742
6. ^ ^{a b c d e} Goldrei, Derek (1996), Classic Set Theory, London: Chapman and Hall, p. 3, ISBN 0-412-60610-0
7. ^ ^a b c d Goldrei, Derek (1996), Classic Set Theory, London: Chapman and Hall, p. 4, ISBN 0-412-60610-0
8. ^ Goldrei, Derek (1996), Classic Set Theory, London: Chapman and Hall, p. 5, ISBN 0-412-60610-0
9. ^ Nielsen, Michael A; Chuang, Isaac L (2000), Quantum Computation and Quantum Information, New York: Cambridge University Press, p. 62, ISBN 0-521-63503-9, OCLC 43641333
10. ^ Nielsen, Michael A; Chuang, Isaac L (2000), Quantum Computation and Quantum Information, New York: Cambridge University Press, pp. 69–70, ISBN 0-521-63503-9, OCLC 43641333
11. ^ M. Benatia, A. Lazrik, and K. Sami, "Arabic mathematical symbols in Unicode", 27th Internationalization and Unicode Conference, 2005.

[edit]External links

• The complete set of mathematics Unicode characters
• Jeff Miller: Earliest Uses of Various Mathematical Symbols
• Numericana: Scientific Symbols and Icons
• GIF and PNG Images for Math Symbols
• Mathematical Symbols in Unicode
• Using Greek and special characters from Symbol font in HTML
• Unicode Math Symbols - a quick form for using unicode math symbols.
• DeTeXify handwritten symbol recognition — doodle a symbol in the box, and the program will tell you what its name is

Some Unicode charts of mathematical operators:

• Index of Unicode symbols
• Range 2100–214F: Unicode Letterlike Symbols
• Range 2190–21FF: Unicode Arrows
• Range 2200–22FF: Unicode Mathematical Operators
• Range 27C0–27EF: Unicode Miscellaneous Mathematical Symbols–A
• Range 2980–29FF: Unicode Miscellaneous Mathematical Symbols–B
• Range 2A00–2AFF: Unicode Supplementary Mathematical Operators

Some Unicode cross-references:

• Short list of commonly used LaTeX symbols and Comprehensive LaTeX Symbol List
• MathML Characters - sorts out Unicode, HTML and MathML/TeX names on one page
• Unicode values and MathML names
• Unicode values and Postscript names from the source code for Ghostscript

Categories: 

• Mathematical notation
• Mathematics-related lists
• Mathematical symbols
• Mathematical tables
• Mathematical logic
• Lists of symbols

قس عربی

الرموز الرياضية (بالإنجليزية: mathematical symbols) هو اختصار لعلامة رياضية أو شكل هندسي أو وحدة قياس وهى تستخدم من أجل تسهيل الكتابة فمثلا كتابة كلمة سنتيمتر أمر شاق فت اختصارها إلى سم والجداول التالية توضح الرموز الرياضية باختلافها

محتويات   [أخف]  1 الرموز الأولية 2 الرموز الثانوية 3 الرموز الهندسية 4 اختصارات الوحدات

[عدل]الرموز الأولية

هي الرموز التي يستخدمها الإنسان في معظم المسائل الرياضية والجدول التالى يوضح الرموز الابتدائية :

الـرمز	معناه	استخدامه	مثال
=	يساوى	يتخدم في المعادلات لتبيين أن طرفيها متساوون	3 + 5 == 8 ، 8 == 8
≠	لايساوى	يستخدم لنفى تساوى المعادلات	5 + 8 ≠ 16
+	زائد ، موجب	هي علامة جمع الأعداد وكذلك تسخدم كإشارة للأعداد الموجبة	8 + 2 = 10 ، +7
-	ناقص ، سالب	هي علامة طرح الأعداد وكذلك يستخدم كإشارة للعدد السالب	10 - 8 = 2 ، -8
<	أكبر من	العلامة السابقة تستخدم في المتباينة للدلالة على أن الطرف الأيسر في المتباينة أكبر من الطرف الأيمن	4 + 5 < 10
>	أصغر من	يستخدم هو كذلك في المتباينات للدلالة على أن الطرف الأيسر للمتباينة هو أصغر من الطرف الأيمن لها	10+ 5 > 50
×	في	هي علامة عملية الضرب	3 × 9 = 45
÷	على	هي علامة عملية القسمة	40 ÷ 2 = 20
:	إلى	توضع تلك العلامة بين حدى النسبة	3 : 8
/	لكل	توضع بين حدى المعدل	5 لتر / ساعة
± ، ∓	زائد أو ناقص	توضع بين مقدارين حيث تبين أن أحد المقدارين يمكن أن محذوفا أو مضافا لآخر	7لتر ± 1/2 لتر
≤	أكبر من أويساوى	يوضع في المقارنة بين المجموعات للدلالة على أن المجموعة التي على الطرف الأيسر من المقارنة فيها عناصر أكبر من الأخرى ولكن يوجد عنصر واحد فيها هو الذي يساوى عنصر آخر من المجموعة	{4 ، 5 ، 6 ، 7} ≤ {4 ، 8 ، 10}
≥	أصغر من أو يساوى	توضع في المقارنة بين المجموعات للدلالة على أن المجموعة التي على الطرف الأيسر من المقارنة فيه عناصر أقل من الأخرى ولكن يوجد عنصر واحد فقط هو الذي يساوى عنصر آخر من المجموعة	{8 ، 7 ، 10} ≥ {4 ، 5 ، 6 ، 7}
∅أو	فاى / الجموعة الخالية	يساوى هذا الرمز أى مجموعة ليس لها عناصر	عند توازى مستقيمن فإن نقطة تقاطعهما هي ∅
∈	ينتمى	يعنى هذا الرمز إنتماء عنصر لمجموعة	7 ∈ {8 ، 7 ، 1 ، 10}
∉	لاينتمى	يعنى هذا الرمز عدم انتماء أحد العناصر من المجموعة	12 ∉ {1 ، 2}
⊂	يحتوى / جزئية	معناه أن هناك مجموعة صغيره تعتبر جزئا من مجموعة أخرى كبيرة	{1 ، 8 ، 10} ⊂ {1 ، 5 ، 78 ، 10 ، 1}
⊄	لاتحتوى / ليست جزئية	عكس يحتوى تماما	{1 ، 5 ، 10} ⊄ {6 ، 30 ، 8 ، 70 ، 9}
%	بالمائة	يقرن بذلك الرمز عددا حيث يبين أن هذا الرمز له نسبة من المائة	2% ، 12 %
‰	بالألف	يقرن بذلك الرمز عددا حيث يبين أن هذا الرمز له نسبة من الألف	2% ، 12 %
≈	تساوى تقريبا	يستخدم ذلك الرمز في تقريب الأعداد العشرية إل أعداد صحيحة	7.5 ≈ 8

[عدل]الرموز الثانوية

الرمز	معناه	استخدامه	مثال
≪	أكبر بكثير من	يستخدم هذا الرمز للدلالة على العددين المقارنة الطرف الايسر لها أكبر بكثير من ا الطرف الأيمن	2 ≪ 10000000
≫	أقل بكثير من	يستخدم هذا الرمز للدلالة على العدد ين المقارن بينهما الطرف الأيسر أقل بكثير من الطرف الأيمن	1000000 ≫ 2
∞	مالانهاية	يستخدم الرمز في التعبير عن المجموعات غير المنتهية	ط = {0 ، 1 ، 2 ، 3 ، 4 ، ∞}
∩	تقاطع	يوضع بين المجموعتين المراد معرفة العناصر المشتركة فيما بينهما	{8 ، 7 ، 9 ، 1} ∩ {5 ، 9 ، 4 ، 7} = {7 ، 9}
√	جذر	يوضع على يمين الرمز العدد المراد معرفة جذره	2- أو 2 = 4√
| |	مقياس / القيمة المطلقة	يوضع بين العمودين العدد المراد معرفة قيمته المطلقة	| -8 | = 8
∪	اتحاد	يوضع هذا الرمز بين المجموعتين المراد دمج عناصر كلا منهما	{5 ، 3 ، 2} ∪{8 ، 2 ، 9} = {5 ، 3 ، 2 ، 8 ، 9 }

[عدل]الرموز الهندسية

هي الرموز التي نستخدمها في الهندسة والجدول التالى يوضح بعضا منها

الرمز	معناه	استخدامه	مثال
//	يوازى	يوضع هذا الرمز بين الضلعين أو المستقيمين المتوازيين	ب جـ // دأ
⊥	عمودى على	يوضع هذا الرمز بين الضلعين الذي يكون أحدهما عمودا على الآخر فيشكلون زاويتين قائمتين من التعامد أو 4	س ص ⊥ ن ع
≡	يتطابق	يوضع هذا الرمز بين الشكلين أو الضلعين اللذان يتساويان فيهما أضلاعهما وزوايهما	أب ≡ م س
π	=باى	هذا الرمز هو نسبة مبسطة لعلاقة بين محيط دائرة وقطرها ويساوى تقريبا3.14 و	ــــــــــــ
°	درجة	يستخدم هذا الرمز اختصارا لكلمة درجة سواء أكان قياسها للحرارة أو للزاوية	قياس الزاوية م = 50°
ق	قياس	اختصار كلمة قياس	ق (ن م أ) = 80°
∆	مثلث	اختصار كلمة مثلث	∆ أب جـ ≡ د هـ و
○	دائرة	اختصار كلمة دائرة	○ س قطرها يساوى 2سم
□	مربع	اختصار كلمة مربع	□ أب جـ د ≡ د هـ جـ س

[عدل]اختصارات الوحدات

تختصر بعض الوحدات من أجل تسهيل الكتابة والجدول التالى يوضح بعضا منها :

اسم الوحدة بالإنجليزية	اسم الوحدة بالعربية	الاختصار
KiloGram	كيلو غرام	كجم
Gram	غرام	جم
Tons	طن	لايوجد اختصارات
Centimeter	سنتيمتر	سم
Meter	متر	م
Millie Gram	مليجرام	ملجم
Liter	لتر	لا يوجد اختصارات
Millie Liter	مليلتر	مل
Square meters	متر مربع	م²
Square centimeter	سنتيمتر مربع	سم²
Square kilometers	كيلومتر مربع	كم²
Cubic centimeter	سنتيمتر مكعب	سم³
Cubic meters	متر مكعب	م³
Cubic kilometers	كيلومتر مكعب	كم³

•  بوابة الرياضيات

تصنيفات: 

• رموز رياضية
• قوائم متعلقة بالرياضيات
• منطق رياضي