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- W3136193296 abstract "Given a non-negative Jacobi matrix describing higher order recurrence relations for multiple orthogonal polynomials of type~II and corresponding linear forms of type I, a general strategy for constructing a pair of stochastic matrices, dual to each other, is provided. The corresponding Markov chains (or 1D random walks) allow, in one transition, to reach for the N-th previous states, to remain in the state or reach for the immediately next state. The dual Markov chains allow, in one transition, to reach for the N-th next states, to remain in the state or reach for immediately previous state. The connection between both dual Markov chains is discussed at the light of the Poincare's theorem on ratio asymptotics for homogeneous linear recurrence relations and the Christoffel-Darboux formula within the sequence of multiple orthogonal polynomials and linear forms of type I. The Karlin-McGregor representation formula is extended to both dual random walks, and applied to the discussion of the corresponding generating functions and first-passage distributions. Recurrent or transient character of the Markov chain is discussed. Steady state and some conjectures on its existence and the relation with mass points are also given. The Jacobi-Pineiro multiple orthogonal polynomials are taken as a case study of the described results. For the first time in the literature, an explicit formula for the type~I Jacobi--Pineiro polynomials is determined. The region of parameters where the Markov chains are recurrent or transient is given, and it is conjectured that when recurrent, the Markov chains are null recurrent and, consequently, the expected return times are infinity. Examples of recurrent and transient Jacobi--Pineiro random walks are constructed explicitly." @default.
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- W3136193296 date "2021-03-25" @default.
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- W3136193296 title "Multiple Orthogonal Polynomials and Random Walks" @default.
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