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Home > Vol 26, No 2 (2007)

Wakako Nakai and Tomoki Nakanishi

Nagoya University Graduate School of Mathematics Nagoya 464-8602 Japan

We study the Jacobi-Trudi-type determinant which is conjectured to be the q-character of a certain, in many cases irreducible, finite-dimensional representation of the quantum affine algebra of type  D _n . Unlike the A _n and B _n cases, a simple application of the Gessel-Viennot path method does not yield an expression of the determinant by a positive sum over a set of tuples of paths. However, applying an additional involution and a deformation of paths, we obtain an expression by a positive sum over a set of tuples of paths, which is naturally translated into the one over a set of tableaux on a skew diagram.

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