Results 61 to 70 of about 233,365 (231)

Some Results on the Deficiencies of Some Differential-Difference Polynomials of Meromorphic Function

open access: yesMathematics, 2018
For a transcendental meromorphic function f ( z ) , the main aim of this paper is to investigate the properties on the zeros and deficiencies of some differential-difference polynomials.
Hong-Yan Xu, Xiu-Min Zheng, Hua Wang
doaj   +1 more source

Constructing Krall-Hahn orthogonal polynomials [PDF]

open access: yes, 2014
Given a sequence of polynomials $(p_n)_n$, an algebra of operators $\mathcal A$ acting in the linear space of polynomials and an operator $D_p\in \mathcal A$ with $D_p(p_n)=\theta_np_n$, where $\theta_n$ is any arbitrary eigenvalue, we construct a new ...
Antonio J. Durán   +3 more
core  

Multivariate Differences, Polynomials, and Splines

open access: yesJournal of Approximation Theory, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Polynomial solutions of differential–difference equations

open access: yesJournal of Approximation Theory, 2011
We investigate the zeros of polynomial solutions to the differential-difference equation \[ P_{n+1}(x)=A_{n}(x)P_{n}^{\prime}(x)+B_{n}(x)P_{n}(x), n=0,1,... \] where $A_{n}$ and $B_{n}$ are polynomials of degree at most 2 and 1 respectively. We address the question of when the zeros are real and simple and whether the zeros of polynomials of adjacent ...
Dominici, Diego   +2 more
openaire   +4 more sources

Determinant Forms, Difference Equations and Zeros of the q-Hermite-Appell Polynomials

open access: yesMathematics, 2018
The present paper intends to introduce the hybrid form of q-special polynomials, namely q-Hermite-Appell polynomials by means of generating function and series definition.
Subuhi Khan, Tabinda Nahid
doaj   +1 more source

Nevanlinna Theory of the Wilson Divided-difference Operator

open access: yes, 2017
Sitting at the top level of the Askey-scheme, Wilson polynomials are regarded as the most general hypergeometric orthogonal polynomials. Instead of a differential equation, they satisfy a second order Sturm-Liouville type difference equation in terms of ...
Cheng, Kam Hang, Chiang, Yik-Man
core   +2 more sources

An exact formula for general spectral correlation function of random Hermitian matrices

open access: yes, 2003
We have found an exact formula expressing a general correlation function containing both products and ratios of characteristic polynomials of random Hermitian matrices. The answer is given in the form of a determinant.
Akemann G   +29 more
core   +1 more source

Difference Sets and Polynomials

open access: yes, 2015
We provide upper bounds on the largest subsets of $\{1,2,\dots,N\}$ with no differences of the form $h_1(n_1)+\cdots+h_{\ell}(n_{\ell})$ with $n_i\in \mathbb{N}$ or $h_1(p_1)+\cdots+h_{\ell}(p_{\ell})$ with $p_i$ prime, where $h_i\in \mathbb{Z}[x]$ lie in in the classes of so-called intersective and $\mathcal{P}$-intersective polynomials, respectively.
Lyall, Neil, Rice, Alex
openaire   +2 more sources

Defect correction from a galerkin viewpoint [PDF]

open access: yes, 1985
We consider the numerical solution of systems of nonlinear two point boundary value problems by Galerkin's method. An initial solution is computed with piecewise linear approximating functions and this is then improved by using higher—order piecewise ...
Moore, G
core   +1 more source

Discrete Darboux transformation for discrete polynomials of hypergeometric type

open access: yes, 1998
Darboux Transformation, well known in second order differential operator theory, is applied here to the difference equation satisfied by the discrete hypergeometric polynomials(Charlier, Meixner-Krawchuk, Hahn)
  +14 more
core   +1 more source

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