Root sign √√

cause

With ∴∴.

Greater than or equal to ≥

Less than or equal to ≤≤≤≤

About equal to ≈ ≈.

About equal to ≈ ≈.

Not equal to ≦ ≦.

congruence

Vertical

Angle ∠д

O o o degrees

circular

Cross circle

right triangle

null set

intersection

Harmonious set

Infinite infinity ∞∞∞

Integer symbol ∫∫

Symbol of line integral

-

1 geometric symbol

⊥‖∠⌒⊙≡≌ △

2 algebraic symbols

∝∧∨~∫≠ ≤≥≈∞∶

3 operation symbol

×÷√

4-symbol set

∪∩∈

Five special symbols

∑π(π)

6 reasoning symbol

| a |⊥∽△∞∩∩≦≦≤∑←→↓↖↗↘↙‖∧∨

& amp；

①②③④⑤⑥⑦⑧⑨⑩

Γ Δ Θ∧ Ξ Ο ∏∑ Φ Χ Ψ Ω

α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω

Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ Ⅸ Ⅹ Ⅺ Ⅻ

ⅰ ⅱ ⅲ ⅳ ⅴ ⅵ ⅶ ⅷ ⅸ ⅹ

∈∏∑∕√∝∞∟∠∣‖∧∨∩∪∫∮∴∵∶∷∽≈≌≈≠≡≤≥≤≥≮≯⊕⊙⊥

⊿⌒ ℃

Index 0 123:

symbolic meaning

∞ infinity

Pippi

The absolute value of the |x| function

Set up and merge

Set intersection

≥ greater than or equal to

≤ less than or equal to

≡ Constant is equal to or congruent with.

Natural logarithm of ln(x)

Logarithm with base 2

Log(x) ordinary logarithm

Integer function on floor (x)

Integer function under ceil(x)

X mod y of remainder

{x} fractional part x-floor(x)

∫f(x)δx indefinite integral

∫ [a: b] The definite integral of f (x) Δ x a to b

If p is true, it is equal to 1, otherwise it is equal to 0.

∑& lt； K>[ 1≤k≤n]f(k) sum n can be extended to many situations.

Such as: ∑ < n >; [n is a prime number] [n <; 10]f(n)

∑& lt； I> ∑ <; j & gt[ 1≤i≤j≤n]n^2

lim f(x)(x-& gt； ? ) seek the limit

The m-th derivative function of f<m & gt(z)f about z

C(n:m) combination number, where m is taken from n.

P(n:m) permutation number

Separable n

M⊥n coprime

A ∈ A a belongs to set A.

# Multiple elements in set A

Supplement:

Greek alphabet

Α α Κ κ Τ σ

Β β ∧ λ Υ τ

Γ γ Μ μ Φ υ

Δ δ Ν ν Χ φ

Ε ε Ξ ξ Ψ χ

Ζ ζ Ο ο Ω ψ

Η η ∏ π

Θ θΡ ρ

ιι∑l

mathematical symbol

+ - × ÷ / √

∑ ∏

≈ ≠ = ≤ ≥ < > ≮ ≯

∫ ∞ →

∨ ∵ ∴

∪ ∩ ∈ 「

⊥ ‖ ∠ ⌒ ⊙ ≌ ∽