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math.CA2017
Sobolev extremal polynomials with respect to mutually singular measures
A. Diaz Gonzalez, G. Lopez Lagomasino, H. Pijeira Cabrera
We consider extremal polynomials with respect to a Sobolev-type -norm, with and measures supported on compact subsets of the real line. For a wide class of such ext…
math.CA2016
Nikishin systems on star-like sets: Ratio asymptotics of the associated multiple orthogonal polynomials
Abey López-García, Guillermo López Lagomasino
We investigate the ratio asymptotic behavior of the sequence of multiple orthogonal polynomials associated with a Nikishin system of measures tha…