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Re: Prime ideals in the ring of continuous functions

Subject: Re: Prime ideals in the ring of continuous functions
From: Sasha P
Date: Fri, 20 Oct 2006 11:17:17 EDT
Newsgroups: sci.math
> No, it clearly is maximal. Take an ultrafilter F on
> P([0,1]). Then the
> set of functions f such that the zero set of f is in
> F is a prime ideal.

Why the set of such functions is ideal?

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