1, geometric symbol

⊥‖∞⌒⊙≦≦△| a |⊥∽∣∟‖|

2. Algebraic symbols

∝ ∧ ∨ ~ ∫ ≤ ≥ ≈ ∞ ∶〔〕〈〉《》「」『』〖

3. Operation symbols

× ÷ √ ≠ ≡ ≮ ≯

4. Symbol set

∪ ∩ ∈ Φ ? ￠

5. Special symbols

※∑π(π)@ # ☆★◎◇◆□■▓⊿.

￥ Γ Δ Θ ∧ Ξ Ο ∏ ∑ Φ Χ Ψ Ω ∏

6. Inference symbols

↓↓→↓↖↗↘↙∴∵∷t？ ü

7. Punctuation symbol' ˇˇ''

8. Others

& amp； ℃ № $ ￡ ￥ ‰ ℉ ♂ ♀

① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩

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:o 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.

Ln(x) logarithm based on e

Lg(x) logarithm based on 10

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

∑[ 1≤k≤n]f(k) and n can be extended to many situations, such as ∑ [n is a prime number] [n

∑∑[ 1≤i≤j≤n]n^2

lim f(x)(x-& gt； ? ) seek the limit

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

P(n:m) permutation number

Divisible by n

(m, n)= 1 m and n coprime

A ∈ A a belongs to set A.

The number of elements in set A of card (A).

| a |⊥∽△∞∩∩≦≦∴≦≤∈‖↑→↓↖↗↘↙‖∧∨

?

①②③④⑤⑥⑦⑧⑨⑩

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

∈∏∑∕√∝∞∟∠∣‖∧∨∩∪∫∮∴∵∶∷∽≈≌≈≠≡≤≥≤≥≮≯⊕⊙⊥⊿⌒

For convenience, also make some agreements!

The square of x can be typed as x 2 (and so on).

The square root of x+ 1 can be marked as √(x+ 1), remember to put brackets;

1/x, you can enter1/x; If it is one tenth of x+65438+, please enter1(x+1), and please enclose the numerator and denominator in brackets & lt Example: a.

& lt= means less than or equal to (not greater than) Example: a

& gt= means greater than or equal to (not less than) Example: a & gt=b, that is, A is not less than B;

For example, a b is the b power of a, which can also be used to open the root sign. For example, a (1/2) represents the square root of a.

* means multiply by ...

/stands for floating-point division: 3/2= 1.5.

\ stands for a separable example: 3 \ 2 = 1... 1 () braces, allowing multiple nesting, regardless of size, medium and small, with the highest priority.

Example: ((2 * (-2)) * 3) * 1 Yes {[2 * (-2)] * 3} * 1.

The subscript x2 can be expressed as: x(2)

Operating rules:

1, two operation symbols cannot be adjacent. For example, A with negative B is a/(-b). In this case, the brackets cannot be omitted.

2. Operation sequence: power → multiplication and division → addition and subtraction.