在非紧的一般拓扑空间中证明了一个涉及容许集值映象的叠合定理.作为应用,证明了一个极大极小不等式、一个截口定理和一个最佳逼近定理,
A new coincidence theorem involving admissible set-valued mappings is proved in general noncompact topological spaces. As applications, a minimax inequality, a section theorem and a best approximation theorem are also given.