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

3 votes

Why do the projections in the Calkin algebra not form a lattice?

I can't add a comment, although I'd like to clarify one point: both in Nik Weaver's Set theory and C*-algebras and Eric Wofsey's $P(\omega)/\mathrm{fin}$ and projections in the Calkin algebra it is cl …
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