On zero behavior of higher-order Sobolev-type discrete q-Hermite I orthogonal polynomials

被引:0
|
作者
Huertas, Edmundo J. [1 ]
Lastra, Alberto [1 ]
Soria-Lorente, Anier [2 ]
Soto-Larrosa, Victor [1 ]
机构
[1] Univ Alcala, Dept Fis & Matemat, Ctra Madrid Barcelona Km 33,600, Alcala De Henares 28805, Madrid, Spain
[2] Univ Granma, Dept Tecnol, Carretera Bayamo Manzanillo Km 17,5, Bayamo 85100, Cuba
关键词
Orthogonal polynomials; Sobolev-type orthogonal polynomials; q-Hermite polynomials; q-Hypergeometric series; HARMONIC-OSCILLATOR; AL-SALAM; SEQUENCES; EQUATIONS; RESPECT;
D O I
10.1007/s11075-024-01868-y
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
In this work, we investigate the sequence of monic q-Hermite I-Sobolev type orthogonal polynomials of higher-order, denoted by {Hn(x; q)} n=0, which are orthogonal with respect to the following non-standard inner product involving q-differences: p, q . = 1 -1 f (x) g (x) (qx,-qx; q)8dq (x) +. (D j q f)(a)(D j q g)( a), where. belongs to the set of positive real numbers, D j q denotes the j -th q -discrete analogue of the derivative operator, q ja. R\(-1, 1), and (qx,-qx; q)8 dq (x) denotes the orthogonality weight with its points of increase in a geometric progression. Connection formulas between these polynomials and standard q-Hermite I polynomials are deduced. The basic hypergeometric representation of Hn(x; q) is obtained. Moreover, for certain real values of a satisfying the condition q ja. R\(-1, 1), we present results concerning the location of the zeros of Hn( x; q) and perform a comprehensive analysis of their asymptotic behavior as the parameter. tends to infinity.
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页数:25
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