V stands for operation in mathematics. Mathematically, operation is a behavior, and a new quantity is obtained through possible combinations of known quantities. The essence of operation is the mapping between sets. Generally speaking, operation refers to algebraic operation, which is the correspondence in a set.

What do v and inverted v mean respectively? 1. Logical operation symbol.

(1) "∧" means and is equivalent to the intersection in a set. The true value of the proposition P∧Q is related to the true values of P and Q. When both P and Q are true propositions, the proposition P∧Q is true and the rest are false propositions.

(2) "∨" means or, which is equivalent to the union of sets. The truth value of the proposition P∨Q is also related to the truth values of P and Q. When both P and Q are false propositions, the proposition P∧Q is false and the rest are true propositions.

2. In fuzzy mathematics, the symbol ∧ indicates the operation of taking the minimum value, whereas ∨ indicates the operation of taking the maximum value.

That is, for any a, b∈{0, 1}, there are:

a∧b=min {0， 1}=0

a∨b=max {0， 1}= 1

Third, define the transformation function. For example, if the function f(t) satisfies the Fourier transform condition, its Fourier transform can be defined as λ f (t).