Cyclic cohomology of Hopf algebras of transverse symmetries in codimension 1

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dc.creatorMoscovici, Henri
dc.creatorRangipour, Bahram
dc.date2006-02-01
dc.date2006-06-07
dc.date.accessioned2026-07-07T07:03:01Z
dc.date.available2026-07-07T07:03:01Z
dc.descriptionWe develop intrinsic tools for computing the periodic Hopf cyclic cohomology of Hopf algebras related to transverse symmetry in codimension 1. Besides the Hopf algebra found by Connes and the first author in their work on the local index formula for transversely hypoelliptic operators on foliations, this family includes its `Schwarzian' quotient, on which the Rankin-Cohen universal deformation formula is based, the extended Connes-Kreimer Hopf algebra related to renormalization of divergences in QFT, as well as a series of cyclic coverings of these Hopf algebras, motivated by the treatment of transverse symmetry for nonorientable foliations. The method for calculating their Hopf cyclic cohomology is based on two computational devices, which work in tandem and complement each other: one is a spectral sequence for bicrossed product Hopf algebras and the other a Cartan-type homotopy formula in Hopf cyclic cohomology.
dc.description64 pages; corrected typos. Adv. Math., to appear
dc.identifierhttps://arxiv.org/abs/math/0602020
dc.identifierhttp://arxiv.org/abs/math/0602020
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/108817
dc.subjectQuantum Algebra
dc.subjectOperator Algebras
dc.subject58B34, 81R10, 81R15, 81R60
dc.titleCyclic cohomology of Hopf algebras of transverse symmetries in codimension 1
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