Diophantine non-integrability of a third order recurrence with the Laurent property

Details Diophantine non-integrability of a third order recurrence with the Laurent property Diophantine non-integrability of a third order recurrence with the Laurent property

2006-01-13

arxiv.org/abs/math/0601324v3

Mathematics

Number Theory

7 pages; statement of Proposition 2 and minor typos corrected. To appear in J. Phys. A: Math. Gen

Scientific paper

10.1088/0305-4470/39/12/L01

We consider a one-parameter family of third order nonlinear recurrence relations. Each member of this family satisfies the singularity confinement test, has a conserved quantity, and moreover has the Laurent property: all of the iterates are Laurent polynomials in the initial data. However, we show that these recurrences are not Diophantine integrable according to the definition proposed by Halburd. Explicit bounds on the asymptotic growth of the heights of iterates are obtained for a special choice of initial data. As a by-product of our analysis, infinitely many solutions are found for a certain family of Diophantine equations, studied by Mordell, that includes Markoff's equation.

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