本文引入和研究德摩根拓扑代数的可数公理、可分性和连通性，拓宽了原有的结果。
Countability axioms, separability and connectedness are introduced and investigated for a DE Morgan algebra of topology. Thus the scope of a DE Morgan algebra of topology is extended.
在具有半开集可数交性质的S-L空间中，讨论了几个S-分离性公理之间的关系。
The relations of S-separation axioms in S-L space that has countable intersection property of seim-open set were obtained.
在具有半开集可数交性质的S-L空间中，讨论了几个S-分离性公理之间的关系。
The relations of S-separation axioms in S-L space that has countable intersection property of seim-open set were obtained.
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