摘要：The main objective of this paper is to establish some new retarded nonlinear sum-difference inequalities with two independent variables, which provide explicit bounds on unknown functions. These inequalities given here can be used as handy tools in the study of boundary value problems in partial difference equations. 2000 Mathematics Subject Classification: 26D10; 26D15; 26D20.
关键词：sum-difference inequalities ; boundary value problem
