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Talk:Heine–Cantor theorem

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This is an old revision of this page, as edited by Katzmik (talk | contribs) at 14:12, 26 October 2008 (Non-constructive). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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"See also" section does not introduce any new information. I suggest to delete it.

Non-constructive

As the proof is by contradiction (rather than by passing to the contrapositive), it is not constructive. It may be worth pointing this out in the article itself. Katzmik (talk) 11:31, 26 October 2008 (UTC)[reply]

Actually, it is possible to give a proof that is not a proof by contradiction. See [1]. I thought this one is more standard. (In fact, it appears in Rudin, if I remember correctly.) -- Taku (talk) 13:14, 26 October 2008 (UTC)[reply]
The proof of the existence of a finite subcover used here is surely non-constructive. I would be surprised if there exists a constructive proof for this theorem. There may be deep reasons for this. Katzmik (talk) 14:12, 26 October 2008 (UTC)[reply]