Geodesic
Constructive solution of one vector equilibrium problem
Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleniâ, Tome 491 (2020), pp. 15-18

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We study a two-dimensional vector logarithmic-potential equilibrium problem with the Nikishin matrix of interaction. A constructive method for finding the supports of a vector equilibrium measure is given. The densities of the components of the equilibrium measure are expressed in terms of an algebraic function that is explicitly written out. The problem is motivated by the study of the convergence of the Frobenius–Padé and Hermite–Padé rational approximants.
Keywords: logarithmic potential, vector equilibrium problem, Nikishin matrix of interaction, equilibrium measure, Frobenius–Padé approximants, Hermite–Padé approximants. 
@article{DANMA_2020_491_a2,
     author = {A. I. Bogolyubskii and V. G. Lysov},
     title = {Constructive solution of one vector equilibrium problem},
     journal = {Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleni\^a},
     pages = {15--18},
     publisher = {mathdoc},
     volume = {491},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DANMA_2020_491_a2/}
}
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A. I. Bogolyubskii; V. G. Lysov. Constructive solution of one vector equilibrium problem. Doklady Rossijskoj akademii nauk. Matematika, informatika, processy upravleniâ, Tome 491 (2020), pp. 15-18. http://geodesic.mathdoc.fr/item/DANMA_2020_491_a2/