2 papers
math.GM2025
On recurrence coefficients of classical orthogonal polynomials
K. Castillo, G. Gordillo-Núñez
In Lett. Math. Phys. 114, 54 (2024) and 115, 70 (2025), the author introduces what is presented as a novel method for determining whether a sequence of orthogonal polynomials is "c…
math.CA2025
The multiple Markov theorem on Angelesco sets
K. Castillo, G. Gordillo-Núñez
By addressing a long-standing open problem, listed in a highly regarded collection of open questions in the field and described as a "worthwhile research project", this note extend…