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General topology

Mesfer Alqahtan

New member
Feb 28, 2013
A space X is called T1/2 if every singleton is either open or closed.
a) prove or disprove that the product of T1/2 space is T1/2 space (T 1/2 it is mean T half of separation axioms)


Staff member
Feb 24, 2012
In our forum rules, specifically rule #11, we ask that you show some effort. This gives our helpers an indication of where you are stuck and what you may be doing wrong. This will benefit you far more than if someone just works the problem for you.