Mathematics – Classical Analysis and ODEs
Scientific paper
2006-08-13
Theoretical and Mathematical Physics, 133 (2): 1455-1462 (2002)
Mathematics
Classical Analysis and ODEs
Scientific paper
A unique analytic continuation result is proven for solutions of a relatively general class of difference equations by using techniques of generalized Borel summability. We overview applications exponential asymptotics and analyzable function theory to difference equations, in defining an analog of the Painlev\'e property for them and we sketch the conclusions with respect to the solvability properties of first order autonomous ones. It turns out that if the Painlev\'e property is present the equations are explicitly solvable and in the contrary case, under further assumptions, the integrals of motion develop singularity barriers. We apply the method to the logistic map $x_{n+1}=ax_n(1-x_n)$ where it turns out that the only cases with the Painlev\'e property are $a=-2, 0, 2$ and 4 for which explicit solutions indeed exist; in the opposite case an associated conjugation map develops singularity barriers.
Costin Ovidiu
Kruskal Martin D.
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