3 papers
math.CA2021
Structural formulas for matrix-valued orthogonal polynomials related to hypergeometric operators
C. Calderón, M. M. Castro
We give some structural formulas for the family of matrix-valued orthogonal polynomials of size introduced by C. Calderón et al. in an earlier work, which are common ei…
math.CA2015
New real variable methods in H summability of Fourier series
Calixto P. Calderón, A. Susana Coré, Wilfredo Urbina
In this paper we shall be concerned with summability, for of the Fourier series of arbitrary functions. The methods to be employed here are a ref…
math.CA2012
On Abel summability of Jacobi polynomials series, the Watson Kernel and applications
Calixto P. Calderón, Wilfredo Urbina
In this paper we return to the study of the Watson kernel for the Abel summabilty of Jacobi polynomial series. These estimates have been studied for over more than 30 years. The ma…