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.
New results on the constrained mock-Chebyshev least squares operator
Dell'Accio, FrancescoMembro del Collaboration Group
;Nudo, FedericoMembro del Collaboration Group
;Occorsio, DonatellaMembro del Collaboration Group
2026-01-01
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.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
