有界可测和L可积函数的巴色伐尔（Parseval）等式成立的充要条件

Realizable Condition of Parseval Equality of Bounded Measurable Function and L Integrable Function

本文举例说明有界可测和Ｌ可积函数的巴色伐尔等式不一定成立。给出该等式成立的充要条件。

This article illustrates that Parseral equality of bounded measurable function and L integrable function is not always realized.And provides equality realization with necessary and sufficient condition.