Degenerating Riemann surfaces and the Quillen metric

Details Degenerating Riemann surfaces and the Quillen metric Degenerating Riemann surfaces and the Quillen metric

2011-06-15

arxiv.org/abs/1106.3092v1

Mathematics

Algebraic Geometry

Scientific paper

The degeneration of the Quillen metric for a one-parameter family of Riemann surfaces has been studied by Bismut-Bost and Yoshikawa. In this article we propose a more geometric point of view using Deligne's Riemann-Roch theorem. We obtain an interpretation of the singular part of the metric as a discriminant and the continuous part as a degeneration of the metric on Deligne products, which gives an asymptotic development involving the monodromy eigenvalues. This generalizes the results of Bismut-Bost and is a version of Yoshikawa's results on the degeneration of the Quillen metric for general degenerations with isolated singularities in the central fiber.

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