Mathematical Symbols Flashcards
1
Q
∈
A
ELEMENT OF
1
Q
∉
A
NOT AN ELEMENT OF
2
Q
∎
A
END OF PROOF
3
Q
−
A
MINUS SIGN ( to subtract,minus,take)
(negative sign = negative, minus, the opposite of)
4
Q
∓
A
MINUS-OR-PLUS SIGN
5
Q
∕
A
DIVISION SLASH/ Obelus ( divide by,over)
6
Q
√
A
SQUARE ROOT
7
Q
∛
A
CUBE ROOT
8
Q
∜
A
FOURTH ROOT
9
Q
∞
A
INFINITY
10
Q
+
A
Plus sign (plus, add)
10
Q
∠
A
ANGLE
11
Q
∧
A
LOGICAL AND
12
Q
∨
A
LOGICAL OR
13
Q
∩
A
INTERSECTION
14
Q
∪
A
UNION
15
Q
≅
A
APPROXIMATELY EQUAL TO
16
Q
≈
A
ALMOST EQUAL TO
17
Q
≠
A
NOT EQUAL TO
18
Q
≤
A
LESS-THAN OR EQUAL TO
19
Q
≥
A
GREATER-THAN OR EQUAL TO
20
Q
⊂
A
proper SUBSET OF
21
Q
⊄
A
NOT A SUBSET OF
22
Q
X
A
times,multiply by
Cartesian product/ cross product/cross
23
ø
Empty Set
24
Á,–A
complement of A, A prime
25
G.C.D
Greatest Common Divisor
26
L.C.D
Least Common Denominator/ Multiple
27
N!
n factorial
28
|a|
absolute value of a, modulus of a, numerical value of a
29
1.5
one and a half / one point five
30
10,000
ten thousand
31
0
Zero, oh, nought , love, nil
32
A'
complement of A, A prime
33
X
cross product ( Cartesian product )
34
(a,b)
the open interval a
35
Ā
complex conjugate of matrix A
36
||A||
the norm of the matrix A
37
f(x)
f of (x), the value at x of the function f
38
f^-1(x)
the value of the inverse of f at x
39
--->
tends to / approaches
40
x~y
x similar to y
41
<---->
if and only if (iff)
