Discrete Spectral Transformations of Skew Orthogonal Polynomials and   Associated Discrete Integrable Systems
  Discrete spectral transformations of skew orthogonal polynomials are presented. From these spectral transformations, it is shown that the corresponding discrete integrable systems are derived both in 1+1 dimension and in 2+1 dimension. Especially in the (2+1)-dimensional case, the corresponding system can be extended to 2x2 matrix form. The factorization theorem of the Christoffel kernel for skew orthogonal polynomials in random matrix theory is presented as a by-product of these transformations. 
Hiroshi Miki, Hiroaki Goda and Satoshi Tsujimoto
math-ph math.MP