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arxiv: 1111.6328 · v4 · pith:3OGENU7Wnew · submitted 2011-11-28 · 🧮 math.KT · math.QA

Twisted Cyclic Cohomology and Modular Fredholm Modules

Adam Rennie , Andrzej Sitarz , Makoto Yamashita This is my paper
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keywords fredholmmodulescyclicmodularcharacterscherncohomologytwisted
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Connes and Cuntz showed in [Comm. Math. Phys. 114 (1988), 515-526] that suitable cyclic cocycles can be represented as Chern characters of finitely summable semifinite Fredholm modules. We show an analogous result in twisted cyclic cohomology using Chern characters of modular Fredholm modules. We present examples of modular Fredholm modules arising from Podle\'s spheres and from $SU_q(2)$.

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