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In addition to the already mentioned schools, the University of Nebraska has at least 3 professors working in $C^*$-algebras, including a new hire: Chris Schaffhauser, who did a postdoc at Waterloo. UNL also has an active group of graduate students who hold learning seminars.
@EduardoLonga: could one not use the same idea for a riemannian manifold with two isomorphic boundary components, gluing just one? More specifically, I'm thinking of a cylinder $[0, 1] \times \mathbb{S}^1$, and gluing two of these: one along $\{0\} \times \mathbb{S}^1$ and the other along $\{1\} \times \mathbb{S}^1$.
It seems strange that $j_*\mathcal{E}$ would be a coherent $\mathcal{O}_X$-module. Of course, this is quasi-coherent, but $j$ is not proper (unless $X \setminus U$ is empty...) so coherent sheaves on $U$ don't go to coherent sheaves on $X$. Do you mean there is some vector bundle $\mathcal{E}'$ on $X$ that restricts to $\mathcal{E}$ on $U$? (e.g. as in Hartshorne Ex. II.5.15?)
