如果更改此设置中的任何参数，则它会覆盖映射设置。
If you change any parameter in this setting, it will override the map setting.
次中紧空间在闭的紧覆盖映射下的象是次中紧的；
The image if a submesocompact space under a closed and compact-covering mapping is submesocompact.
此外本文还证明了度量空间上的1 -序列商，紧映射是1 -序列覆盖映射。
It is also shown that: 1-sequentially quotient, compact mapping is 1-sequentially covering mappings.
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