Equilibrium problems for vector potentials with semidefinite interaction matrices and constrained masses

Details Equilibrium problems for vector potentials with semidefinite interaction matrices and constrained masses Equilibrium problems for vector potentials with semidefinite interaction matrices and constrained masses

2011-05-16

arxiv.org/abs/1105.3088v2

Mathematics

Classical Analysis and ODEs

32 pages, to appear in Constructive Approximation

Scientific paper

We prove existence and uniqueness of a solution to the problem of minimizing the logarithmic energy of vector potentials associated to a $d$-tuple of positive measures supported on closed subsets of the complex plane. The assumptions we make on the interaction matrix are weaker than the usual ones and we also let the masses of the measures vary in a compact subset of $\R_+^d$. The solution is characterized in terms of variational inequalities. Finally, we review a few examples taken from the recent literature that are related to our results.

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