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Last-modified: 2010-09-22 (水) 22:20:33

Definition Edit

A subset S of a topological space X is called semi-regular (or regular semi-open) if there is some regular open set V such that imgtex.fcgi?%5bres=100%5d%7b$V%5csubset%20S%5csubset%5cmathrm%7bcl%7dV$%7d%25.png.

Reference Edit

J. Dontchev and M. Ganster, Some comments on θ-irresolute and quasi-irresolute functions, Serdica Math. J. 21 (1995), 67-74