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

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Constructing $C^*$-Categories from Groupoids

Let $G$ be a discrete group and $\mathcal{G}$ a groupoid, that is, a small category in which every arrow is an isomorphism. Wolfgang Lück explains how we can construct a $C^*$-category from $\mathcal{ …
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