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countably almost preorthocompact

Last-modified: 2015-11-17 (火) 19:02:48

Definition Edit

A space X is called countably almost preorthocompact provided that, if C is a countable open cover of X, there is a reflexive relation V on X so that, for each z in X, V(z) is open and whenever y is in imgtex.fcgi?%5bres=100%5d%7b$V%5ccirc%20V%28x%29$%7d%25.png and x is in V(z), {x, y} is a subset of some member of C.

Reference Edit

  • Hans-Peter Kunzi and Peter Fletcher, Some Questions Related to Almost 2-Fully Normal Spaces, Rocky Mountain J. Math. Vol.15 (Nov. 1985).