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Eisenstein series and quantum affine algebras

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arxiv alg-geom/9604018 v2 pith:GSY3SCPJ submitted 1996-04-26 alg-geom math.AGmath.QAq-alg

Eisenstein series and quantum affine algebras

classification alg-geom math.AGmath.QAq-alg
keywords algebragivenisomorphismaffinealgebrasanalogyclasscurve
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Let X be a smooth projectibe curve over a finite field. We consider the Hall algebra H whose basis is formed by isomorphism classes of coherent sheaves on X and whose typical structure constant is the number of subsheaves in a given sheaf belonging to a given isomorphism class and with given isomorphism class of quotient. We study this algebra in detail. It turns out that its structure is strikingly similar to that of quantum affine algebras in their loop realization of Drinfeld. In this analogy the set of simple roots of a semisimple Lie algebra g corresponds to the set of cusp forms on X, the entries of the Cartan matrix of g to the values of Rankin-Selberg L-functions associated to two cusp forms. For the simplest instances of both theories (the curve P^1, the Lie algebra g=sl_2) the analogy is in fact an identity.

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Cited by 4 Pith papers

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    The twisted Cherednik spectrum is a q,t-deformation of the polynomial eigenfunctions built from symmetric ground states and weak-composition excitations at q=1.

  3. Non-commutative creation operators for symmetric polynomials

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  4. Integrable systems inspired by DAHA and DIM algebra: type $C^\vee C$ versus type $A$

    hep-th 2026-07 accept novelty 4.5

    Type C∨C DAHA and Koornwinder systems mirror type-A Macdonald structures for Hamiltonians, recursions, evaluations and dualities, but lack a usable Noumi-Shiraishi-style universal series and SL(2,Z)-type twisting auto...