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Last-modified: 2012-10-04 (木) 14:34:20

Definition Edit

  • A space topological space (X,τ) is called pre-T_1 iff to each pair of distinct points x, y of X, there exists a pair of pre-open? sets one containing x but not y and other containing y but not x.

Property Edit

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).