也谈分段函数的初等性

Elementary properties to separate function

主要讨论一类能表示成最大值函数、最小值函数的分段函数的初等性。证明了只要能表示成最大值函数或最小值函数的分段函数一定是初等函数。

The elementary properties of a sort of separate function which can be described maximum function or minimal function are researched. It proves that the separate function must be elementary function if only it can be described maximum functon or minimal function.