ON SAMPLING AND SECOND ORDER DIFFERENCE EQUATIONS
Recently a discrete version of Kramer's sampling theorem has been developed. The new theorem allows us to derive sampling expansions associated with difference equations instead of differential equations as is the case of Kramer's theorem. Here we derive a biorthogonal version of the discrete theorem and give a sampling theorem associated with not necessarily selfadjoint difference equations. Thus, examples using Hermite, Laguerre and Jacobi polynomials can be derived. 1991 Mathematics Subject Classification: 39A12.