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- Instituto de Biocomputación y Física de Sistemas Complejos8 papers
- Instituto Universitario de Matemáticas y AplicacionesES7 papers
- Leiden UniversityNL7 papers
- Universidad de MálagaES7 papers
- Instituto de Nanociencia y Materiales de AragónES6 papers
- Universidad Complutense de MadridES6 papers
- Sapienza University of RomeIT5 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT4 papers
- Universitat Rovira i VirgiliES4 papers
- Consejo Superior de Investigaciones CientíficasES3 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di NapoliIT3 papers
- Lancaster UniversityGB3 papers
5 papers · 1 filter
An algorithm to obtain global solutions of the double confluent Heun equation
J. Abad, F. J. Gomez, J. Sesma
A procedure is proposed to construct solutions of the double confluent Heun equation with a determinate behaviour at the singular points. The connection factors are expressed as qu…
Wall rational functions and Khrushchev's formula for orthogonal rational functions
Olav Njastad, Luis Velazquez
We prove that the Nevalinna-Pick algorithm provides different homeomorphisms between certain topological spaces of measures, analytic functions and sequences of complex numbers. Th…
Hopf algebras in dynamical systems theory
J. F. Carinena, K. Ebrahimi-Fard, H. Figueroa +1
The theory of exact and of approximate solutions for non-autonomous linear differential equations forms a wide field with strong ties to physics and applied problems. This paper is…
Measures on the unit circle and unitary truncations of unitary operators
Maria J. Cantero, Leandro Moral, Luis Velazquez
In this paper we obtain new results about the orthogonality measure of orthogonal polynomials on the unit circle, through the study of unitary truncations of the corresponding unit…
Minimal representations of unitary operators and orthogonal polynomials on the unit circle
M. J. Cantero, L. Moral, L. Velazquez
In this paper we prove that the simplest band representations of unitary operators on a Hilbert space are five-diagonal. Orthogonal polynomials on the unit circle play an essential…