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T_{EF}

Last-modified: 2013-04-19 (金) 13:16:12

Definition Edit

  • A topological space (X,τ) said to be a T_{EF} if every finite subset of X is either open or closed.

Property Edit

Reference Edit

  • McSherry, D. M. G. , On separation axioms weaker than T_1. , Proc. Roy. Irish Acad. Sect. A 74 (1974), 115–118.