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1. The Baire category theorem - Aarhus Universitet

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Proof of <strong>Baire</strong>’s <strong>category</strong> <strong>theorem</strong> - continued<br />

Finally the completion of the proof in the case of a complete metric<br />

space:<br />

As above B0 ⊇ B1 ⊇ B2 ⊇ B3 ⊇ ... and ∞ k=1 Bk ⊆ ∞ k=0 Vk ∩B0.<br />

It remains therefore only to show that ∞ Choose xk ∈ Bk. We claim that {xk} ∞ k=1<br />

k=1 Bk = ∅.<br />

is a Cauchy sequence in S.<br />

Klaus Thomsen <strong>1.</strong> <strong>The</strong> <strong>Baire</strong> <strong>category</strong> <strong>theorem</strong>

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