1, geometric symbol:
Geometry is the study of spatial structure and properties. It is one of the most basic research contents in mathematics, and the common theorems are Pythagorean Theorem, euler theorem Theorem and Stewart Theorem.
Common symbols are ⊥ (vertical), ∨ (parallel), ∞ (angle), ⌒ (arc) and ⊙ (circle).
2, algebraic symbols:
The research object of algebra is not only numbers, but various abstract structures. Among them, we only care about various relationships and their nature, but we don't care about the question "what is the number itself".
Common symbols are: ∧ (proportion), ∧ (logical sum), ∨ (logical OR), ∫ (integer), ≦ (inequality), ≤ (less than or equal to), ≥ (greater than or equal to), ≈ (approximately equal to) and ∞ (infinity). ?
3, operation symbol:
Operational symbols are symbols used in computational mathematics, and computational symbols include plus sign, minus sign, multiplication sign and division sign.
Common symbols are: × (multiplication), ⊙ (division), √ (root sign) and (addition and subtraction).
4. Symbol set:
A collection refers to a collection of concrete or abstract objects with certain attributes, which are called elements of a collection. On the whole, certain, definite and distinguishable things are called sets, or sets for short.
Common symbols are ∩ (union), ∩ (intersection) and ∈ (attribution).
5. Special symbols:
A specific symbol is often used in mathematics to represent an element.
Common symbols are ∑ (sum) and π (pi).
6. Greek symbols:
In mathematics, Greek letters are usually used to represent constants, special functions and some specific variables. In the field of mathematics, the meanings of uppercase and lowercase Greek letters are usually different and irrelevant.
Commonly used symbols are: α (α), β (β), γ (γ), δ (δ), ε (ε), ζ (ζ), η (eta), θ (west tower), ι (eota), κ (Campa), λ.
Extended data:
A common set of symbols:
1、C？ Complex set
2. Me? Imaginary number set
3、N？ Natural number set, a non-negative integer set (containing the element "0")
4, N*(N+) positive natural number set, positive integer set (where * means to remove the element "0" from the set, such as R* means non-zero real number).
5、P？ Prime set
6、Q？ Rational number set
7、R？ Real number set
8、Z？ Integer set
9. Accounts receivable? On the quotient set of r on set a
10, [a] cyclic groups generated by element a.
Congruence class set of 1 1, Z/(n) module n
12, r(R) relation? Reflexive closure of r
13, s(R) relation? Symmetric closure of r
References:
Baidu encyclopedia-mathematical symbols