The problems of determining the spectrality or non-spectrality of a measure have been received much attention in recent ......

The intuitionistic fuzzy set (IFS) based on fuzzy theory,which is of high efficiency to solve the fuzzy problem, has bee......

Under non-random uncertainty, a new idea of finding a possibly optimal solution for linear programming problem is examin......

本文用开球去刻画分形几何中开集条件（OSC）的开集,并得出一些结论。这些结论对一类函数迭代系统（ISF）是否满足开集条件,只需通过验证是......