泛映射族的性质

A Property of Universal Map Classes

讨论了泛映射族的性质，证明了任何从紧空间到紧空间的泛映射放是全体连续映射族的闭子集．

In this Paper, we study a proghy of universal map classes and indicate that theclass of universal maps from a compact space to a cmpct space is closed.