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A Banach space is a complete normed vector space: A vector space equipped with a norm such that every Cauchy sequence converges.

7 votes
2 answers
2k views

Baire Category Theorem Application

In Antoine Henrot Michel Pierre - Variation et optimisation de formes, Une analyse geometrique, a book I'm studying I found an interesting problem. The problem is listed below. The first 3 points of …
1 vote

Are weak and strong convergence of sequences not equivalent?

A remark in H. Brezis, Functional Analysis, Sobolev Spaces and Partial Differential Equations, Chapter 3: In any infinite dimensional space the weak topology is strictly coarser than the strong t …
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