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Periodic solutions of nonlinear second-order difference equations

Creators: Rodriguez, Jesús, Etheridge, Debra Lynn

File Type: pdf | Filesize: 199.6 KB | Date Added: 2012-09-05 | Date Created: 2005-05-31

We establish conditions for the existence of periodic solutions of nonlinear, second-order difference equations of the form y(t + 2) + by (t + 1) + cy(t) = f (y(t)), where f: &#8477; &#8594; &#8477; and &#946; &gt; 0 is continuous. In our main result we assume that f exhibits sublinear growth and that there is a constant uf (u) &gt; 0 such that |u| &#8805; &#946; whenever c = 1. For such an equation we prove that if N is an odd integer larger than one, then there exists at least one N-periodic solution unless all of the following conditions are simultaneously satisfied: |b| &lt; 2, N across-1(-b/2), and &#960; is an even multiple of c &#8800; 0.