Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-12-06
Lett.Math.Phys. 31 (1994) 233-246
Physics
High Energy Physics
High Energy Physics - Theory
14/9 pages in harvmac, Tel-Aviv preprint TAUP 2125-93
Scientific paper
10.1007/BF00761715
We prove an identity between three infinite families of polynomials which are defined in terms of `bosonic', `fermionic', and `one-dimensional configuration' sums. In the limit where the polynomials become infinite series, they give different-looking expressions for the characters of the two integrable representations of the affine $su(2)$ algebra at level one. We conjecture yet another fermionic sum representation for the polynomials which is constructed directly from the Bethe-Ansatz solution of the Heisenberg spin chain.
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