Poincare biextension and ideles on the algebraic curve
Sergey Gorchinskiy
Abstract
Arbarello, de Concini, and Kac have constructed a central extension of the ideles group on a smooth projective algebraic curve. We show a relation of this central extension with the theta-bundle and the Poincare biextension of the Jacobian of the curve. As an application we get a new proof of the adelic formula for the Weil pairing.
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