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Hecke modifications of conformal blocks outside the critical level (2509.02368v1)
Published 2 Sep 2025 in math.RT, math-ph, math.AG, and math.MP
Abstract: We define Hecke modifications of conformal blocks over affine Lie algebras at non-critical level by using the Hecke modifications of the underlying $G$-bundles. We show that this procedure is equivalent to the insertion of a twisted vacuum module at an additional marked point and provide an explicit description using coordinate transformations.
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