Title
Stable regions of Turán expressions
Abstract
Consider polynomial sequences that satisfy a first-order differential recurrence. We prove that if the recurrence is of a special form, then the Turán expressions for the sequence are weakly Hurwitz stable (non-zero in the open right half-plane). A special case of our theorem settles a problem proposed by S. Fisk that the Turán expressions for the univariate Bell polynomials are weakly Hurwitz stable. We obtain related results for Chebyshev and Hermite polynomials, and propose several extensions involving Laguerre polynomials, Bessel polynomials, and Jensen polynomials associated to a class of real entire functions.
Year
DOI
Venue
2015
10.1016/j.jat.2014.12.002
Journal of Approximation Theory
Keywords
Field
DocType
mathematics,primary,orthogonal polynomials
Wilson polynomials,Laguerre polynomials,Classical orthogonal polynomials,Orthogonal polynomials,Mathematical analysis,Gegenbauer polynomials,Discrete orthogonal polynomials,Jacobi polynomials,Mathematics,Difference polynomials
Journal
Volume
Issue
ISSN
192
C
J.Approx.Theory 192 (2015) 144-155
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Matthew Chasse100.34
Lukasz Grabarek200.34
Mirkó Visontai300.34