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Results tagged with fa.functional-analysis
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user 336768
Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.
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Empty spectrum of an operator
Recently, I was studying the spectrum of an operator $T$ on a normed
linear space $X$. In order to ensure that the spectrum is non-empty, one
needs to assume that $X$ is a complex Banach space. But th …
