Work

New results on the constrained mock-Chebyshev least squares operator

Year: 2025

Type: article

Abstract: In this paper, we extend the constrained mock-Chebyshev least squares operator to quasi-uniform grids, preserving the accuracy and applicability of the original approach while addressing the practical challenge of quasi-equispaced nodes. Additionally, we provide an improved bound for the norm of the operator by using a refined bound for its coefficient vector through the direct elimination method. Numerical experiments confirm the efficiency of the proposed technique.

Source: Journal of Computational and Applied Mathematics

Authors: Francesco Dell’Accio, Domenico Mezzanotte, Federico Nudo, Donatella Occorsio

Institutions: University of Calabria, University of Basilicata, Istituto Nazionale di Alta Matematica Francesco Severi, Istituto per le Applicazioni del Calcolo Mauro Picone, National Research Council

Language: English

Topic: Mathematical functions and polynomials

Subfield: Applied Mathematics

Field: Mathematics

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,250