Many difficult (often NP-complete) optimization problems can be solved efficiently on graphs of small tree-width with a given tree decomposition. In this paper,
The singularly perturbed boundary value problem for the nonlinear boundary conditions is considered. Under suitable conditions,the asymptotic behavior of soluti
By using the Krasnoselskii''s fixed point theorem for cones, conditions for the existence of positive solutions to the three-point boundary value proble