generalized almost periodic function

In this paper, we introduced almost periodic function into characterization theory system of crystal structure, gained a similar series of result, on the basis of existing periodic function characterization, such as almost periodic Bloch wave, almost periodic reciprocal space, almost periodic Brillouin zone, almost periodic Fermi level, et al.

本文将殆周期函数引入晶体结构的描述理论体系,在原有的周期函数描述基础上,获得了殆周期布洛赫波、殆周期倒易空间、殆周期布里渊区、殆周期费米能级等相似的系列结果。

In this paper the concept of extended periodic function is intraoduced.

首先引入广义周期函数的概念 ,然后给出了变系数一阶线性时滞微分方程的一个实用的可积充分判据 ,从而扩大了常微分方程的封闭求积范围 。