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Positive solutions for nonlinear difference equations. (English) Zbl 0883.39002
The author determines the values of \(\lambda\) for which the nonlinear difference equation \[ \Delta^2 x(t-1)+ \lambda\alpha(t) f(x(t))=0, \qquad 1\leq t\leq T+1 \] has positive solutions, subject to appropriate boundary conditions.

MSC:
39A10 Additive difference equations
39A12 Discrete version of topics in analysis
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