Results 91 to 100 of about 27,421 (244)

Quantitative expansivity for ergodic Zd$\mathbb {Z}^d$‐actions

open access: yesJournal of the London Mathematical Society, Volume 111, Issue 4, April 2025.
Abstract We study expansiveness properties of positive measure subsets of ergodic Zd$\mathbb {Z}^d$‐actions along two different types of structured subsets of Zd$\mathbb {Z}^d$, namely, cyclic subgroups and images of integer polynomials. We prove quantitative expansiveness properties in both cases, strengthening combinatorial results from two distinct ...
Alexander Fish, Sean Skinner
wiley   +1 more source

Symbolic computation of Appell polynomials using Maple

open access: yesElectronic Journal of Differential Equations, 2001
This work focuses on the symbolic computation of Appell polynomials using the computer algebra system Maple. After describing the traditional approach of constructing Appell polynomials, the paper examines the operator method of constructing the same ...
H. Alkahby   +3 more
doaj  

The Hermite polynomials and the Bessel functions from a general point of view

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
We introduce new families of Hermite polynomials and of Bessel functions from a point of view involving the use of nonexponential generating functions.
G. Dattoli   +2 more
doaj   +1 more source

Series of Products of Bessel Polynomials [PDF]

open access: yesCanadian Journal of Mathematics, 1959
The Bessel polynomials, which arise as solution of the classical wave equation in spherical co-ordinates, are defined by Krall and Frink (3) by the equation1The purpose of this paper is to present some series of products of these polynomials when the two arguments are different as in the case of Legendre and Hermite polynomials. Such an explanation was
openaire   +2 more sources

On a Class of Polynomials in the Theory of Bessel's Functions [PDF]

open access: yesTransactions of the American Mathematical Society, 1926
vanishes are known to be infinite in number for a general value of n. Their importance in mathematical physics has led to their calculation for positive integral values of n. They may also be regarded as branches of an infinitely many branched function of a complex variable.
openaire   +2 more sources

Theory of multiindex multivariable Bessel functions and Hermite polynomials

open access: yesLe Matematiche, 1997
We discuss the theory of multivariable multiindex Bessel functions (B.F.) and Hermite polynomials (H.P.) using the generating function method. We derive addition and multiplication theorems and discuss how generalized H.P.
G. Dattoli   +3 more
doaj  

An operational collocation based on the Bell polynomials for solving high order Volterra integro-differential equations [PDF]

open access: yesJournal of Mahani Mathematical Research
In this paper, an operational matrix method based on the Bell polynomials  has been presented to find approximate solutions of high-order Volterra integro-differential equations.
Najmeh Kasaei   +2 more
doaj   +1 more source

On the zeros of a class of polynomials including the generalized Bessel polynomials

open access: yesJournal of Computational and Applied Mathematics, 1993
AbstractIt is proved that the real part of any zero of the polynomial PN+1(x) of degree N which is defined by an+1Pn+1(x) − anPn−1(x) − bnPn(x) = xcnPn(x),P0(x) = 0, P1(x) = 1, is negative in the case bn > 0, cn > 0. A consequence of this result is that the zeros of the Bessel polynomials, as well as the zeros of the generalized Bessel polynomials for ...
E. K. Ifantis, Panayiotis D. Siafarikas
openaire   +2 more sources

On the approximation of analytic functions by infinite series of fractional Ruscheweyh derivatives bases

open access: yesAIMS Mathematics
This paper presented a new Ruscheweyh fractional derivative of fractional order in the complex conformable calculus sense. We applied the constructed complex conformable Ruscheweyh derivative (CCRD) on a certain base of polynomials (BPs) in different ...
Mohra Zayed , Gamal Hassan
doaj   +1 more source

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