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pre-Difference set

Last-modified: 2010-12-08 (水) 02:14:32

Definition Edit

  • A subset S of a topological space (X,τ) is called a semi-Difference set (in short pD-set) if there are two pre-open? sets U, V in X such that imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20U%5cneq%20X%20%5cmbox%7b%20and%20%7dS=U%5csetminus%20V%20%5c%5d%7d%25.png.

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).