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- Newsgroups: sci.math
- Path: sparky!uunet!enterpoop.mit.edu!galois!riesz!jbaez
- From: jbaez@riesz.mit.edu (John C. Baez)
- Subject: Re: proof wanted 2
- Message-ID: <1993Jan8.211809.21338@galois.mit.edu>
- Sender: news@galois.mit.edu
- Nntp-Posting-Host: riesz
- Organization: MIT Department of Mathematics, Cambridge, MA
- References: <1993Jan8.195646.1694@cc.umontreal.ca>
- Date: Fri, 8 Jan 93 21:18:09 GMT
- Lines: 15
-
- In article <1993Jan8.195646.1694@cc.umontreal.ca> cazelaig@ERE.UMontreal.CA (Cazelais Gilles) writes:
- >
- > n
- >Is it true that if C is a nonempty closed subset of R and x is a point not
- >in C that there exists a point c in C that is closest in C to x.
- >
- >i.e. such that: |x-c'| >= |x-c| for all c' in C.
- >
- >If it is true I would appreciate if someone could give me a proof
- >of the result.
-
- Sounds like a homework problem, but I'll give you a big hint, yes it's
- true, and you get the point c by taking a limit.
-
-
-