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Kudla-Millson forms and one-variable degenerations of Hodge structure

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arxiv 2301.08733 v1 pith:WY5TTI3Y submitted 2023-01-20 math.AG

classification math.AG
keywords hodgeseriesstructuredegenerationskudla--millsonthetaalgebraicallows
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abstract

We consider arbitrary polarized variations of Hodge structure of weight two and $h^{2,0}=1$ over a non--singular complex algebraic curve $S$ and analyze the boundary behaviour of the associated Kudla--Millson theta series using Schmid's theorems on degenerations of Hodge structure. This allows us to prove that this theta series is always integrable over $S$ and to describe explicitly the non-holomorphic part of the Kudla--Millson generating series in terms of the mixed Hodge structures at infinity.

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  1. The cohomological Kudla conjecture for unitary Shimura varieties

    math.NT 2025-07 conditional novelty 8.0 of 10

    The authors construct explicit boundary corrections making the Kudla-Millson generating series of special cycles on compactified unitary Shimura varieties a holomorphic Hermitian modular form for codimensions g ≤ n/2.

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