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Last-modified: 2011-05-29 (日) 03:41:31

Definition Edit

  • A topological space (X,τ) is a T_-1 space if for arbitrary three distinct points of X, one of them is weakly separated from one of the two other points.

Property Edit

  • T_-1 ⇒ S_R?.

Reference Edit

  • Guia, Josep The Sα separation axioms., (Serbo-Croatian summary), Mat. Vesnik 38 (1986), no. 1, 45–57.