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Integration of cocycles and Lefschetz number formulae for differential operators - MaRDI portal

Integration of cocycles and Lefschetz number formulae for differential operators

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Publication:542753

DOI10.3842/SIGMA.2011.010zbMATH Open1227.32027arXiv0904.1891OpenAlexW2134202054WikidataQ115219672 ScholiaQ115219672MaRDI QIDQ542753

Ajay Ramadoss

Publication date: 17 June 2011

Published in: SIGMA. Symmetry, Integrability and Geometry: Methods and Applications (Search for Journal in Brave)

Abstract: Let mathcalE be a holomorphic vector bundle on a complex manifold X such that dimmathbbCX=n. Given any continuous, basic Hochschild 2n-cocycle psi2n of the algebra mDiffn of formal holomorphic differential operators, one obtains a 2n-form fmathcalE,psi2n(mathcalD) from any holomorphic differential operator mathcalD on mathcalE. We apply our earlier results [J. Noncommut. Geom. 2 (2008), 405-448; J. Noncommut. Geom. 3 (2009), 27-45] to show that intXfmathcalE,psi2n(mathcalD) gives the Lefschetz number of mathcalD upto a constant independent of X and mathcalE. In addition, we obtain a "local" result generalizing the above statement. When psi2n is the cocycle from [Duke Math. J. 127 (2005), 487-517], we obtain a new proof as well as a generalization of the Lefschetz number theorem of Engeli-Felder. We also obtain an analogous "local" result pertaining to B. Shoikhet's construction of the holomorphic noncommutative residue of a differential operator for trivial vector bundles on complex parallelizable manifolds. This enables us to give a rigorous construction of the holomorphic noncommutative residue of mathcalD defined by B. Shoikhet when mathcalE is an arbitrary vector bundle on an arbitrary compact complex manifold X. Our local result immediately yields a proof of a generalization of Conjecture 3.3 of [Geom. Funct. Anal. 11 (2001), 1096-1124].


Full work available at URL: https://arxiv.org/abs/0904.1891

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