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    Existence of ositive solutions for a discrete boundary value problem
    (Maltepe Üniversitesi, 2009) Luca-Tudorache, Rodica
    We study the existence and nonexistence of positive solutions of the discrete system with second-order differences, with m + 1-point boundary conditions, where ? is the forward difference operator with stepsize 1, ?un = un+1 ? un. The arguments for existence of solutions are based upon the Schauder fixed point theorem and some auxiliary results from [1] and [2].