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Semiprojectivity of the moduli of principal $G$-bundles with $λ$-connections (2310.15652v2)
Published 24 Oct 2023 in math.AG
Abstract: Let $X$ be a compact connected Riemann surface of genus $g \geq 2$ and $G$ a nontrivial connected reductive affine algebraic group over $\mathbb{C}$. We prove the semiprojectivity of the moduli spaces of semistable $G$-Higgs bundles and $G$-bundles with $\lambda$-connections of fixed topological type $d\in \pi_1(G)$.