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Differential orbifold \(K\)-theory. (English) Zbl 1327.19012

Summary: We construct differential \(K\)-theory of representable smooth orbifolds as a ring valued functor with the usual properties of a differential extension of a cohomology theory. For proper submersions (with smooth fibres) we construct a push-forward map in differential orbifold K-theory. Finally, we construct a non-degenerate intersection pairing with values in \(\mathbb{C}/\mathbb{Z}\) for the subclass of smooth orbifolds which can be written as global quotients by a finite group action. We construct a real subfunctor of our theory, where the pairing restricts to a non-degenerate \(\mathbb{R}/\mathbb{Z}\)-valued pairing.

MSC:

19L50 Twisted \(K\)-theory; differential \(K\)-theory
58J20 Index theory and related fixed-point theorems on manifolds
58J28 Eta-invariants, Chern-Simons invariants
19L47 Equivariant \(K\)-theory
19K56 Index theory
58J35 Heat and other parabolic equation methods for PDEs on manifolds

References:

[1] A. Adem and Y. Ruan, Twisted orbifold K-theory. Comm. Math. Phys. 237 (2003), 533-556. · Zbl 1051.57022 · doi:10.1007/s00220-003-0849-x
[2] M. F. Atiyah, R. Bott, and A. Shapiro, Clifford modules. Topology 3 (1964), Suppl. 1, 3-38. · Zbl 0146.19001 · doi:10.1016/0040-9383(64)90003-5
[3] P. Baum and A. Connes, Chern character for discrete groups. In A fête of topology , Academic Press, Boston 1988, 163-232. · Zbl 0656.55005
[4] N. Berline, E. Getzler, and M. Vergne, Heat kernels and Dirac opera- tors . Grundlehren Text Editions, Springer-Verlag, Berlin 2004. · Zbl 1037.58015
[5] B. Blackadar, K -theory for operator algebras . 2nd ed., Math. Sci. Res. Inst. Publ. 5, Cambridge University Press, Cambridge 1998. · Zbl 0913.46054
[6] E. H. Brown, Jr. and M. Comenetz, Pontrjagin duality for generalized homol- ogy and cohomology theories. Amer. J. Math. 98 (1976), 1-27. · Zbl 0325.55008 · doi:10.2307/2373610
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