Перегляд за автором "Sitarz, A."

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  • An Asymmetric Noncommutative Torus 
    Dąbrowski, L.; Sitarz, A. (Symmetry, Integrability and Geometry: Methods and Applications, 2015)
    We introduce a family of spectral triples that describe the curved noncommutative two-torus. The relevant family of new Dirac operators is given by rescaling one of two terms in the flat Dirac operator. We compute the ...
  • Twisted Cyclic Cohomology and Modular Fredholm Modules 
    Rennie, A.; Sitarz, A.; Yamashita, M. (Symmetry, Integrability and Geometry: Methods and Applications, 2013)
    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 ...