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Intervals of the parameterare determined for which there exist positive solutions for the system of nonlinear differential equations, u (n) + a(t)f(v) = 0, v (n) +b(t)g(u) = 0, for 0 < t < 1, and satisfying three-point nonlocal bound- ary conditions, u(0) = 0,u 0 (0) = 0,...,u (n 2) (0) = 0, u(1) = u(),v(0) = 0,v 0 (0) = 0,... ,v (n 2) (0) = 0, v(1) = v(). A Guo-Krasnosel'skii fixed point

Positive solutions for systems of nth order three-point nonlocal boundary value problems