Yang-Mills theory and Tamagawa numbers

Details Yang-Mills theory and Tamagawa numbers Yang-Mills theory and Tamagawa numbers

2008-01-30

arxiv.org/abs/0801.4733v1

Mathematics

Algebraic Geometry

Accepted for publication in the Bulletin of the London Mathematical Society

Scientific paper

Atiyah and Bott used equivariant Morse theory applied to the Yang-Mills functional to calculate the Betti numbers of moduli spaces of vector bundles over a Riemann surface, rederiving inductive formulae obtained from an arithmetic approach which involved the Tamagawa number of SL_n. This article surveys this link between Yang-Mills theory and Tamagawa numbers, and explains how methods used over the last three decades to study the singular cohomology of moduli spaces of bundles on a smooth complex projective curve can be adapted to the setting of A^1-homotopy theory to study the motivic cohomology of these moduli spaces.

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