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Duality and finiteness for equivariant vector bundles on Drinfeld spaces

Abstract
We study duality and finiteness for locally analytic representations arising from compactly supported coherent cohomology of Drinfeld spaces. We show that Grothendieck--Serre duality for equivariant vector bundles realizes Bernstein--Zelevinsky duality of locally analytic representations. Following Fargues' strategy for $\ell$-adic sheaves, we obtain explicit resolutions of these representations by compactly induced representations. The resolutions imply that the cohomology is of compact presentation, a notion that generalizes finite presentation. As an application, we deduce finiteness and duality for extension groups of supercuspidal locally analytic representations of $\mathrm{GL}_2(\mathbb{Q}_p)$.
This is joint work with Zhenghui Li and Benchao Su.