An R-function is a real-valued function whose sign is completely determined by the signs of its arguments.

函数是一系列实函数，其函数值的符号完全取决于其各个变量的符号。

youdao

An R-function is a real-valued function whose sign is completely determined by the signs of its arguments.

函数是一系列实函数，其函数值的符号完全取决于其各个变量的符号。

youdao