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Monthly Archives: February 2026
Characterizing non-ω-well-filtered spaces by forbidden subspaces
In a 2023 paper, Hualin Miao, Xiaodong Jia, Chong Shen and Qingguo Li characterized ω-well-filtered spaces as those that do not contain any one of two very simple spaces, S1 and SD, as Skula-closed subspaces. This is part of a … Continue reading
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