Projective elliptic genera and elliptic pseudodifferential genera
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(Accepted version)
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2019
Authors
Han, F.
Varghese, M.
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Advances in Mathematics, 2019; 358:106860-1-106860-25
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Fei Han, Varghese Mathai
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Abstract
In this paper, we construct for the first time the projective elliptic genera for a compact oriented manifold equipped with a projective complex vector bundle. Such projective elliptic genera are rational q-series that have topological definition and also have analytic interpretation via the fractional index theorem in Mathai-Melrose-Singer (2006) without requiring spin condition. We prove the modularity properties of these projective elliptic genera. As an application, we construct elliptic pseudodifferential genera for any elliptic pseudodifferential operator. This suggests the existence of putative rotation-equivariant elliptic pseudodifferential operators on loop space whose equivariant indices are elliptic pseudodifferential genera.
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©2019 Elsevier Inc.All rights reserved.