English

Interior Kasparov product for $\varrho$-classes on Riemannian foliated bundles

Differential Geometry 2023-03-06 v2 K-Theory and Homology

Abstract

Let ι ⁣:F0F1\iota\colon \mathcal{F}_0\to\mathcal{F}_1 be a suitably oriented inclusion of foliations over a manifold MM, then we extend the construction of the lower shriek maps given by Hilsum and Skandalis to adiabatic deformation groupoid C*-algebras: we construct an asymptotic morphism (ιad[0,1))!En(C(Gad[0,1)),C(Had[0,1)))(\iota_{ad}^{[0,1)})_!\in E_n\left(C^*(G_{ad}^{[0,1)}), C^*(H_{ad}^{[0,1)})\right), where GG and HH are the monodromy groupoids associated with F0\mathcal{F}_0 and F1\mathcal{F}_1 respectively. Furthermore, we prove an interior Kasparov product formula for foliated ϱ\varrho-classes associated with longitudinal metrics of positive scalar curvature in the case of Riemannian foliated bundles.

Keywords

Cite

@article{arxiv.2201.10616,
  title  = {Interior Kasparov product for $\varrho$-classes on Riemannian foliated bundles},
  author = {Vito Felice Zenobi},
  journal= {arXiv preprint arXiv:2201.10616},
  year   = {2023}
}

Comments

33 pages. In the second version typos have been corrected