论文部分内容阅读
A connection between biorthogonal polynomials and plane partitions is discussed.For a combinatorial problem of counting plane partitions in a rectangular box,or for an equivalent problem of counting rhombus tilings of a hexagonal region,a product formula of MacMahon type is derived by means of biorthogonal polynomials including the little q-Jacobi polynomials.Another proof by using a special solution to the discrete two-dimensional Toda molecule is also shown.