%0 Journal Article %A Martínez Alonso, Luis %A Medina Reus, Elena %T Multiple orthogonal polynomials, string equationsand the large-n limit %D 2009 %@ 1751-8113 %U https://hdl.handle.net/20.500.14352/44794 %X The Riemann-Hilbert problems for multiple orthogonal polynomials of types I and II are used to derive string equations associated with pairs of Lax-Orlov operators. A method for determining the quasiclassical limit of string equations in the phase space of the Whitham hierarchy of dispersionless integrable systems is provided. Applications to the analysis of the large-n limit of multiple orthogonal polynomials and their associated random matrix ensembles and models of non-intersecting Brownian motions are given. %~