Notations & Symbol
Symbol Symbol Name
1) + (plus sign) for Addition
2) - , – (minus sign) for Subtraction
3) * , . , × (asterisk, dot , times, into) for Multiplication
4) ÷ , / , — (division sign , obelus ,slash) for Division
5) = (equal sign) for Equality
6) ≠ (inequal sign) for Inequality
7) ≈ (sign of Approximation)
8) > (greater than)
9) < (less than)
10) ≥ (greater than or equal to)
11) ≤ (less than or equal to)
12) ( ) (parentheses) for calculate expressions
13) [ ] (brackets) for calculate expression
14) ± (plus-minus) both plus minus operations
15) — (horizontal line) for (division, fraction)
16) mod (modulo) for (remainder, calculation)
17) . (period) for (decimal point, into, separator)
18) ab (power) (Exponent)
19) a^b (caret) (Exponent)
20) √a (square root) (√a ⋅ √a = a)
21) 3√a (cube root) (3√a ⋅ 3√a ⋅ 3√a = a)
22) 4√a (fourth root) (4√a ⋅ 4√a ⋅4√a⋅ 4√a = a)
23) n√a (n-th root) (radical)
24) % (percent) (1% = 1/100)
25) ∠ (angle) (formed by two rays measured)
26) arc from point A to point B
27) ⊥ (perpendicular)
28) ∥ (parallel lines)
29) ≅ (congruent to)
30) ~ (similarity)
31) Δ (triangle)
32) |x-y| (distance)
33) π (pi)π = 3.141592654
34) rad (radians)
35) ∟ (right angle)
36) ° (degree)
37) ′ (prime arc minute), 1° = 60′
38) ″ (double prime arc second), 1′ = 60″
39) ≡ (equivalence identical)
40) := (equal by definition)
41) ~ (approximately)
42) ≈ (approximately)
43) ∝ (proportional to)
44) ∞ (lemniscate infinity symbol)
45) ≪ (much less than)
46) ≫ (much greater than)
47) { } (braces set)
48) ∆ (discriminant Δ = b2 - 4ac)
49) A ∩ B intersection objects that belong to set A and set B
50) A ∪ B union objects that belong to set
A or set B
51) A ⊆ B subset A is a subset of B. set A is
included in set B.
52) A ⊂ B proper subset / strict subset
A is a subset of B, but A is not equal to B.
53) A ⊄ B set A is not a subset of set B
54) A ⊇ B superset A is a superset of B. set A
includes set B
55) A ⊃ B proper superset / strict superset
A is a superset of B, but B is not equal to A.
56) A ⊅ B set A is not a superset of set B2A power set all subsets of Apower setall subsets of A
57) A = B equality both sets have the same members.
58) ^ (caret / circumflex)
59) & (ampersand)
60) ∨ (reversed caret)
61) | (vertical line)
62) ! (exclamation mark)
63) ⊕ (circled plus)
64) ~ (tilde negation)
65)⇒ (implies)
66)⇔ equivalent if and only if (iff)
67)↔ equivalent if and only if (iff)
68) ∀ ( for all)
69) ∃ (there exists)
70) # (Hash)
71) ∴ (therefore)
72) ∵ (because / since)
73) @ (at the rate of)
74) $ (Dollar sign)
75) ? (Question Mark)
76)
