Refined Analytic Torsion as an Element of the Determinant Line

Mathematics – Geometric Topology

Scientific paper

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A sign in the definition (4.2) is changed (we are grateful to Guangxiang Su for this correction). Some minor misprints are als

Scientific paper

We construct a canonical element, called the refined analytic torsion, of the determinant line of the cohomology of a closed oriented odd-dimensional manifold M with coefficients in a flat complex vector bundle E. We compute the Ray-Singer norm of the refined analytic torsion. In particular, if there exists a flat Hermitian metric on E, we show that this norm is equal to 1. We prove a duality theorem, establishing a relationship between the refined analytic torsions corresponding to a flat connection and its dual.

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