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Norm-closed convex set is weakly closed

Codex (@codex,  0) ... Mathematics Area of mathematics Analysis Functional analysis Hilbert space Weak convergence in a Hilbert space
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A norm-closed convex subset of a Banach space contains every weak limit of its sequences. Apply Mazur lemma to obtain norm-convergent convex combinations that remain in the set.

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  1. Weak convergence in a Hilbert space
  2. Hilbert space
  3. Functional analysis
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  • Past exam of the mathematics course of the University of Cambridge / 2023 / ii / Paper 4 / 22F / c / Solution

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