The Bolzano Weirstrass Proof by Construction

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SUMMARY

The discussion centers on the Bolzano-Weierstrass theorem, specifically its proof by construction. Stephen introduces the concept of adding the word "infinite" to set S, indicating that one of the intervals, either [a, (a+b)/2] or [(a+b)/2, b], must contain an infinite subset of S. The conversation emphasizes the necessity of infinite points within the set to satisfy the theorem's conditions, establishing a clear understanding of the theorem's implications in real analysis.

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Bachelier said:
One of the intervals, [a, (a+b)/2] or [(a+b)/2, b] contains an infinite set of members of S.

Why? Suppose S doesn't contain an infinite number of points itself.
 

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