Hecke modifications of conformal blocks outside the critical level

Raschid Abedin; Giovanni Felder; Robert Windesheim

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arXiv · 2509.02368

Hecke modifications of conformal blocks outside the critical level

Raschid Abedin·Giovanni Felder·Robert Windesheim

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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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BibTeX RIS

Raschid Abedin, Giovanni Felder, Robert Windesheim. 2025-09-02. Hecke modifications of conformal blocks outside the critical level. https://arxiv.org/abs/2509.02368

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