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Algebras of operators on Hilbert space, $C^*-$algebras, von Neumann algebras, non-commutative geometry

1 vote

Rigorous justification for this formal solution to $f(x+1)+f(x)=g(x)$

Just to add another answer to the pile... I suspect that the 'magic' observed here may be related to so-called local spectral theory. It is possible to do quite a lot (at least in the Banach space se …
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