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Ibukiyama correspondences on automorphic forms on $\operatorname{Mp}_4(\mathbb{A}_\mathbb{Q})$ and $\operatorname{SO}_5(\mathbb{A}_\mathbb{Q})$ generating large discrete series representations at the real place (2312.06921v2)

Published 12 Dec 2023 in math.NT and math.RT

Abstract: In our previous paper we gave proofs of Ibukiyama's correspondences on holomorphic Siegel modular forms of degree 2 of half-integral weight and integral weight. In this paper, we formulate and prove similar correspondences on automorphic forms on $\operatorname{Mp}4(\mathbb{A}\mathbb{Q})$ or $\operatorname{SO}5(\mathbb{A}\mathbb{Q})$ generating large discrete series representations at the real components. In addition, we show that the correspondences can be described in terms of local theta correspondences.

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