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Abstract
In this paper, we study the existence of multiple solutions of boundary value problems for second-order discrete equations ,
,
,
bounded on
. The proofs are based on the upper and lower solutions, degree theory and sequential argument.
Acknowledgements
The authors thank the referees for their valuable comments and suggestions on the manuscript. Supported by grant 10671012 from National Natural Sciences Foundation of P.R. China and grant 20050007011 from Foundation for Ph.D. Specialities of Educational Department of P.R. China, Tianyuan Fund of Mathematics in China (10726038).