281 research outputs found
Francisco Marcellán, nuevo presidente de la Real Sociedad Matemática Española (RSME)
La Real Sociedad Matemática Española (RSME)
es una sociedad científica fundada en 1911 y
entre sus objetivos cabe resaltar: La promoción
y estímulo de la investigación matemática (la
Francisco Marcellán,
nuevo presidente de la
Real Sociedad Matemática
Española (RSME)
Bispectrality for Matrix Laguerre-Sobolev polynomials
In this contribution we deal with sequences of polynomials orthogonal with
respect to a Sobolev type inner product. A banded symmetric operator is
associated with such a sequence of polynomials according to the higher order
difference equation they satisfy. Taking into account the Darboux
transformation of the corresponding matrix we deduce the connection with a
sequence of orthogonal polynomials associated with a Christoffel perturbation
of the measure involved in the standard part of the Sobolev inner product. A
connection with matrix orthogonal polynomials is stated. The Laguerre-Sobolev
type case is studied as an illustrative example. Finally, the bispectrality of
such matrix orthogonal polynomials is pointed out
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