【摘要】 本文利用集值映射的选择理论,对正则空间的亚紧性给予了一种刻划。本文同时推广了选择理论中的两个经典定理。更多还原

【Abstract】 The aim of this paper is to establish the conection between metacompactness and selection. The generalizations of some theorems are also obtained.更多还原