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2 results

  • The Polynomial Behavior of Weight Multiplicities for the Affine Kac–Moody Algebras A(1)r

  • Georgia Benkart, Seok-Jin Kang, Hyeonmi Lee, Kailash C. Misra, Dong-Uy Shin
  • Journal:
    Compositio Mathematica / Volume 126 / Issue 1 / March 2001
    Published online by Cambridge University Press:
    04 December 2007, pp. 91-111
    Print publication:
    March 2001
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  • We prove that the multiplicity of an arbitrary dominant weight for an irreducible highest weight representation of the affine Kac–Moody algebra A(1)r is a polynomial in the rank r. In the process we show that the degree of this polynomial is less than or equal to the depth of the weight with respect to the highest weight. These results allow weight multiplicity information for small ranks to be transferred to arbitrary ranks.