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arxiv: math/9805063 · v1 · submitted 1998-05-13 · 🧮 math.OA · math-ph· math.MP

Construction of Spectral Triples Starting from Fredholm Modules

classification 🧮 math.OA math-phmath.MP
keywords fredholminftyspectralalgebracaseconstructconstructiondiscrete
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Let (A,H,F) be a p-summable Fredholm module where the algebra A= C \Gamma is generated by a discrete group of unitaries in L(H) which is of polynomial growth r. Then we construct a spectral triple (A,H,D) with F= sign D which is q-summable for each q > p+r+1. In case (A,H,F) is (p,\infty)-summable we obtain (q,\infty)-summability of (A,H,D) for each q > p+r+1.

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