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Math Forum » Discussions » sci.math.* » sci.math

Topic: Nhood Space
Replies: 24   Last Post: Jul 3, 2013 10:43 PM

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William Elliot

Posts: 1,811
Registered: 1/8/12
Re: Nhood Space
Posted: Jul 2, 2013 4:10 AM
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On Tue, 2 Jul 2013, Peter Percival wrote:
> William Elliot wrote:
>
> > Arrg. It's hard to follow what your thinking and how it apllies to the
> > problem at hand. From what you've consider, can you directly show
> > cl cl A = A where cl A = { x | {x}nA }, from the axioms (separable or
> > normal included if needed) for a proximity space?
>
> cl cl A = cl A
>
> Shirley.

Ok, show how, from the proximity asioms that cl cl A = cl A.

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