Symbol matematika
≡
|
identically equal
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≅
|
congruent with
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∼
|
approximately
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≠
|
not equal to
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≤
|
less than or equal to
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≥
|
greater than or equal to
|
∧
|
logical and
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∨
|
logical or
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∀
|
for all
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∃
|
there exists
|
Σ
|
n-ary summation
|
∠
|
angle
|
N
|
the set of natural numbers
|
Z
|
the set of whole numbers (integers)
|
R
|
the set of real numbers
|
∅
|
an empty set
|
∞
|
an infinity sign
|
x∈X
|
an element x belongs to a set X
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x∉ X
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an element x doesn’t belong to a set X
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X ⊂ Y
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a set X is a subset of a set Y
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X ∪ Y
|
a union of sets X and Y
|
X ∩ Y
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an intersection of sets X and Y
|
+
|
plus sign/added by
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−
|
minus sign/subtracted by
|
×
|
multiplication/multiplied by
|
÷
|
division/divided by
|
√
|
square root/radical sign
|
⊥
|
orthogonal to/perpendicular
|
Π
|
pi = 3,14159…
|
!
|
factorial
|
∫
|
integral
|
[a,b]
|
a numerical sign
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