∫: indefinite integral, ∮: curve integral, ∧: proportion, ∞: infinity, ∨: sum of terms, ∨: union, ∩: intersection, ∈: a symbol in mathematics, ∈: belonging to, ⌒. This symbol means "even and beautiful" in the metrical form of lyrics and songs. ∽: Similar, π: pi ω: the first uncountable ordinal number.

Ω constant: This symbol is often used to represent the power when inputting mathematical formulas on the computer, because it is inconvenient to input the power. For example, the fifth power of 2 is usually expressed as 2 5. On some calculators, this symbol is used to represent power.

Discrete mathematical symbol

Universal quantifiers and universal propositions.

├ determinant (formula can be proved by L).

Satisfier (formula is valid on e, and formula can be satisfied on e).

p & lt= & gtq？ The equivalence relation between proposition p and q.

P =>q Proposition The implication relationship between P and Q (P is a sufficient condition for Q, and Q is a necessary condition for P).