关键词: 概率函数, 粒子数密度, 正;负能谱系统

Abstract: The products βεi be unnegative is without question in mathematics, but some scientists suspect this conclusion in physics.They regard that the products βεi is both positive and negative in probability function. In order to settle the suspects of the small but fundamental problem, we put forward this discussion for the symbol of products βεi.

Key words: probability function, number of particle density, positive and negative energy spectrum system