Source: Wiktionary, the free dictionary.
This appendix presents Mathematical Symbols . Each symbol is accompanied by its meaning in the field of mathematics (when available). Due to technical limitations, certain symbols cannot serve as titles for entries.
operations [ editar]
Symbol
Meaning
Symbol
Meaning
Symbol
Meaning
+
most; positive
–
any less; negative
±
so-so
×, * or .
multiplied by; times
/, ÷ or :
divided by
=
Same; equal to
≡
equivalent to; congruent
≅
approximately equal
≠
different than; not equal to
≢
not equivalent to
<
smaller than
≤
less or equal
≲
smaller or close than
≪
much smaller than
⋘
much much smaller than
⊀
is not smaller than
>
bigger then
≥
Bigger or equal
≳
greater or close than
≫
much bigger than
⋙
much much bigger than
⊁
is not bigger than
∝
proportional to
| |
absolute value of; module
∞
infinite
%
percent (percentage)
‰
per thousand
‱
per million
[ ]
square brackets
( )
parentheses
{ }
chaves
√
root (square root)
∛
root (cubic root)
∜
root (fourth root)
n!
n fatorial
log
logarithm (logarithm)
^ or **
exponentiation (power)
x¹
cheese to the first power
x²
squared cheese
x³
xis ao cubo
∫
integral
∬
double integral
∭
integral tripla
∮
line integral
∯
surface integral
∰
integral de volume
∱
full clockwise
∲
clockwise linear integral
∳
linear integral in a counterclockwise direction
´
derivative
∂
partial derivative
∇
gradient
∏
productive
∑
summation
Symbol
Meaning
Symbol
Meaning
Symbol
Meaning
∃
exists
∄
does not exist
∅ or {}
empty set
⊃ or ⊇
contains
⊅
Does not contain
∩
intersection; intersects with; intersects
⊋
contains but not equal
⊉
does not contain nor is equal
∪
unity; the union of … with …
⊂
is contained; is a proper subset of
⊄
is not contained; is not a subset of
∌
no information about
⊆
is a subset of
⊈
is neither contained nor equal
⊊
is contained but not equal
∈ or ∊
belongs to; is element/member of; in; it’s at
∉
does not belong to; is not an element of
∋ or ∍
there is at least one
∀
for whatever; for all; for each
#
cardinality
ℕ
set of natural numbers
ℤ
set of whole numbers
ℚ
set of rational numbers
𝕀
set of irrational numbers
ℝ
set of real numbers
ℂ
set of complex numbers
ℍ
set of quaternion numbers
𝕆
conjunto dos number eight
𝕊
set of sedenion numbers
ℙ
Prime number
Symbol
Meaning
Symbol
Meaning
Symbol
Meaning
∧
e
∨
or
\
any less; without
⇒ or →
implies; if then
⇔ or ↔
if and only if
→
from to
¬, / or ~
no (logical negation)
∴
so therefore
∵
why
∶
reason
∷
proportion
∹
excess
|| ||
norm of; length of
Symbol
Meaning
Symbol
Meaning
Symbol
Meaning
½
a way
⅓
one third
⅔
two thirds
⅙
one sixth
⅖
two fifths
⅗
three fifths
⅘
four fifths
⅚
five sixths
⅟
one about nothing
¼
a bedroom
¾
three bedrooms
⅛
an eighth
⅜
three-eighths
⅝
five eighths
⅞
seven eighths
Pi
pi (=3,141…)
Phi
fi, the golden number, golden ratio (=1,618…)
Trigonometry [ editar]
Symbol
Meaning
Symbol
Meaning
Symbol
Meaning
sen or sin
otherwise
cos
cosine
tg or tan
tangent
cotg or cot
cotangent
sec
drying
cossec or csc
cosecant
°
grau
‘
minutes
«
second
∠
acute angle
∡
measured angle
∢
spherical angle
∟
straight angle
|, ∥ or //
parallel to
⊥
perpendicular a
∦
not parallel to
∤
don’t share
∣
divide
≀
product wreath
∿
sine wave
∽ or ≂
similar
∼
similar, proportional or approximately
∝
proportional to
∺
geometric proportion
∻
homothetic
≁
not approximately
external links [ editar]