There exists a counterexample showing that a compact topological space is not necessarily a sequentially compact space.
有反例表明一个紧致拓扑空间不一定是序列紧致的拓扑空间。
It is also shown that: 1-sequentially quotient, compact mapping is 1-sequentially covering mappings.
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.
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。
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