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Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.

9 votes
2 answers
509 views

Projections onto $n$-codimensional subspaces of a Banach space: norms.

Hello, I'd like some help to find an answer I've been looking for since this morning. Let $X$ be a Banach space and let $Y$ be an $n$-codimensional subspace of $X$. Let $P$ be a projection from $X$ o …
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