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η-closed

Last-modified: 2011-11-17 (木) 18:55:18

Definition Edit

  • Th complement of η-open sets are called η-closed.

Reference Edit

  • Dontchev, J.; Popvassilev, S.; Stavrova, D., On the η-expansion topology for the co-semi-regularization and mildly Hausdorff spaces., (English summary), Acta Math. Hungar. 80 (1998), no. 1-2, 9-19.