Title
q-Analogues of Freud weights and nonlinear difference equations
Abstract
In this paper we derive the nonlinear recurrence relation for the recursion coefficients @b"n of polynomials orthogonal with respect to q-analogues of Freud exponential weights. An asymptotic relation for @b"n is given under assuming a certain smoothing condition and the Plancherel-Rotach asymptotic for the corresponding orthogonal polynomials is derived. Special interest is paid to the case m=2. We prove that the nonlinear recurrence relation of @b"n in this case obeys the discrete Painleve property. Motivated by Lew and Quarles, we study possible periodic solutions for a class of nonlinear difference equations of second order. Finally we prove that the Bernstein approximation problem associated to the weights under consideration has a positive solution.
Year
DOI
Venue
2010
10.1016/j.aam.2010.02.003
Advances in Applied Mathematics
Keywords
DocType
Volume
nonlinear recurrence relation,freud weight,certain smoothing condition,case m,freud exponential weight,nonlinear difference equation,bernstein approximation problem,polynomials orthogonal,asymptotic relation,plancherel-rotach asymptotic,corresponding orthogonal polynomial,difference equation,orthogonal polynomial,second order,recurrence relation
Journal
45
Issue
ISSN
Citations 
4
0196-8858
0
PageRank 
References 
Authors
0.34
1
2
Name
Order
Citations
PageRank
Mourad E. H. Ismail17525.95
Z. S. I. Mansour200.68