Does anyone know of any detailed proof of the Atiyah-Singer Index Theorem using KK-theory/ Kasparov products? References to any papers and textbooks are greatly appreciated. Thanks!
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2$\begingroup$ A standard reference is A. Connes and G. Skandalis paper alainconnes.org/docs/longitudinal.pdf. The paper does the index theorem for foliations as well but you can only read the first 3 chapters. $\endgroup$– OmarCommented Jan 16, 2018 at 10:31
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I find the proof in the recent paper of Kasparov
G. Kasparov. Elliptic and transversally elliptic index theory from the viewpoint of KK-theory. J. Noncommut. Geom., 10(4):1303–1378, 2016
difficult but understandable. There are certainly more details than in Kasparov's Inventiones paper.