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Creators/Authors contains: "Kumar, Shrawan"

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  1. We study the spaces of twisted conformal blocks attached to a$$\Gamma$$-curve$$\Sigma$$with marked$$\Gamma$$-orbits and an action of$$\Gamma$$on a simple Lie algebra$$\mathfrak {g}$$, where$$\Gamma$$is a finite group. We prove that if$$\Gamma$$stabilizes a Borel subalgebra of$$\mathfrak {g}$$, then the propagation theorem and factorization theorem hold. We endow a flat projective connection on the sheaf of twisted conformal blocks attached to a smooth family of pointed$$\Gamma$$-curves; in particular, it is locally free. We also prove that the sheaf of twisted conformal blocks on the stable compactification of Hurwitz stack is locally free. Let$$\mathscr {G}$$be the parahoric Bruhat–Tits group scheme on the quotient curve$$\Sigma /\Gamma$$obtained via the$$\Gamma$$-invariance of Weil restriction associated to$$\Sigma$$and the simply connected simple algebraic group$$G$$with Lie algebra$$\mathfrak {g}$$. We prove that the space of twisted conformal blocks can be identified with the space of generalized theta functions on the moduli stack of quasi-parabolic$$\mathscr {G}$$-torsors on$$\Sigma /\Gamma$$when the level$$c$$is divisible by$$|\Gamma |$$(establishing a conjecture due to Pappas and Rapoport). 
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  2. null (Ed.)