Abstract
We revisit the construction of deformed Virasoro algebras from elliptic quantum algebras of vertex type, generalizing the bilinear trace procedure proposed in the 1990s. It allows us to make contact with the vertex operator techniques that were introduced separately at the same period. As a by-product, the method pinpoints two critical values of the central charge for which the center of the algebra is extended, as well as (in the gl(2) case) a Liouville formula.
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Communicated by H.-T. Yau
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Avan, J., Frappat, L. & Ragoucy, E. Deformed Virasoro Algebras from Elliptic Quantum Algebras. Commun. Math. Phys. 354, 753–773 (2017). https://doi.org/10.1007/s00220-017-2909-7
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DOI: https://doi.org/10.1007/s00220-017-2909-7