On Higher regulators of Siegel varieties
Abstract
We construct classes in the middle degree plus one motivic cohomology of the Siegel Shimura variety of almost any dimension. We compute their image by Beilinson's higher regulator in terms of Rankin-Selberg type automorphic integrals. Our construction generalises the one for GSp(4) and for GSp(6). For Siegel varieties associated to small genus symplectic groups, we also show how these integrals unfold.
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