Journal
INTERNATIONAL MATHEMATICS RESEARCH NOTICES
Volume 2011, Issue 17, Pages 3939-3956Publisher
OXFORD UNIV PRESS
DOI: 10.1093/imrn/rnq196
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- Swiss National Science Foundation [200020-105450]
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We prove the cyclic formality conjecture for chains, raised by Tsygan [Formality conjectures for chains. Differential Topology, Infinite-dimensional Lie Algebras, and Applications 261-74. American Mathematical Society Translation Series 2, 194. Providence, RI: American Mathematical Society, 1999.]. It states the existence of an L-infinity-quasi-isomorphism of L-infinity-modules between the cyclic chain complex of smooth functions on a manifold and the differential forms on that manifold. Concretely, we prove that the u-linear extension of Shoikhet's morphism of Hochschild chains [Shoikhet, B. A proof of the Tsygan formality conjecture for chains. Advances in Mathematics 179, no. 1 (2003): 7-37.] solves Tsygan's conjecture.
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