A characterization of the identity function with equation f(p + q +r)=f(p) + f(q) + f(r)
A characterization of the identity function with equation f(p + q +r)=f(p) + f(q) + f(r)
复制标题
用方程 f(p q r)=f(p) f(q) f(r) 表征恒等函数
作者：
Fang, Jin-Hui
