Computing Genus-$2$ Hilbert--Siegel Modular Forms over $\Q(\sqrt{5})$ via the Jacquet--Langlands Correspondence
Clifton Cunningham and Lassina Dembélé
Source: Experiment. Math. Volume 18, Issue 3
(2009), 337-345.
Abstract
In this paper we present an algorithm for computing Hecke eigensystems of Hilbert--Siegel cusp forms over real quadratic fields of narrow class number one. We give some illustrative examples using the quadratic field $\Q(\sqrt{5})$. In those examples, we identify Hilbert--Siegel eigenforms that are possible lifts from Hilbert eigenforms.
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Primary Subjects:
11F41
Keywords: Hilbert--Siegel modular forms; Jacquet--Langlands correspondence; Brandt matrices; Satake parameters
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Experimental Mathematics
