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Last-modified: 2012-10-04 (木) 14:34:29

Definition Edit

  • A space (X,τ) is called pre-T_2 iff to each pair of distinct points x, y of X, there exists a pair of disjoint pre-open? sets one containing x and the other containing y.

Property Edit

  • Every pre-T_2 space is pre-US.

Reference Edit

  • Athisaya Ponmani, S.; Lellis Thivagar, M., Another form of separation axioms. , (English) [J] Methods Funct. Anal. Topol. 13, No. 4, 380-385 (2007).