Additional Information
Author(s) | Liu Yuji |
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This paper is concerned with the nonlinear functional difference equation ∆x(n) = −a(n)x(n) + λh(n)f(n, x(n − τ(n))), where h and f may change sign. Sufficient conditions for the existence of at least one positive T −periodic solution are established.
Author(s) | Liu Yuji |
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