scholarly journals Valiron’s Interpolation Formula and a Derivative Sampling Formula in the Mellin Setting Acquired via Polar-Analytic Functions

2020 ◽  
Vol 20 (3-4) ◽  
pp. 629-652
Author(s):  
Carlo Bardaro ◽  
Paul L. Butzer ◽  
Ilaria Mantellini ◽  
Gerhard Schmeisser

AbstractIn this paper, we first recall some recent results on polar-analytic functions. Then we establish Mellin analogues of a classical interpolation of Valiron and of a derivative sampling formula. As consequences a new differentiation formula and an identity theorem in Mellin–Bernstein spaces are obtained. The main tool in the proofs is a residue theorem for polar-analytic functions.

2020 ◽  
Vol 13 (4) ◽  
pp. 503-514 ◽  
Author(s):  
Carlo Bardaro ◽  
Paul L. Butzer ◽  
Ilaria Mantellini ◽  
Gerhard Schmeisser

Abstract We establish a general version of Cauchy’s integral formula and a residue theorem for polar-analytic functions, employing the new notion of logarithmic poles. As an application, a Boas-type differentiation formula in Mellin setting and a Bernstein-type inequality for polar Mellin derivatives are deduced.


2014 ◽  
Vol 90 (2) ◽  
pp. 213-219 ◽  
Author(s):  
CHRIS CASTILLO ◽  
ROBERT S. COULTER ◽  
STEPHEN SMITH

AbstractWe determine several variants of the classical interpolation formula for finite fields which produce polynomials that induce a desirable mapping on the nonspecified elements, and without increasing the number of terms in the formula. As a corollary, we classify those permutation polynomials over a finite field which are their own compositional inverse, extending work of C. Wells.


2013 ◽  
Vol 831 ◽  
pp. 450-454
Author(s):  
Tie Yan ◽  
Ji Jun Li ◽  
Xing Bao Gao ◽  
Xiao Feng Sun ◽  
Shuai Shao

The interpolation algorithm in survey calculation is widely used in petroleum engineering, and it is different from the general mathematical interpolation. Along with the development of oil exploitation, various special type of well begin to appear, but the original interpolation method can not meet the needs of the field work. So the paper according to classical interpolation model of the interpolation algorithm, the three optimization intercalation models the curvature radius of curvature, minimum curvature, and natural curve were figured out. Theory analysis and results show that optimized interpolation formula the paper established can meet all kinds of optimization calculation of the inclined interpolation needs.


Author(s):  
QIUHUI CHEN ◽  
CHARLES A. MICCHELLI ◽  
YI WANG

In this paper, we introduce a family of real-valued functions which have spline spectra. They extend the well-known Sinc function and generally are the restrictions to the real line of analytic functions in a strip containing the real axis. We investigate various properties of these functions including those related to interpolation, orthogonality, and stability. Moreover, a sampling formula is provided for their construction and some applications for signal analysis are given.


Sign in / Sign up

Export Citation Format

Share Document