LU-Factorization Versus Wiener-Hopf Factorization for Markov Chains

被引:0
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作者
Vincent Vigon
机构
[1] Université de Strasbourg,IRMA
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关键词
Markov chains; Random walks; LU-factorization; Path-decomposition; Fluctuation theory; Probabilistic potential theory; Infinite matrices; 60J10; 60J45; 47A68; 15A23;
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摘要
Our initial motivation was to understand links between Wiener-Hopf factorizations for random walks and LU-factorizations for Markov chains as interpreted by Grassman (Eur. J. Oper. Res. 31(1):132–139, 1987). Actually, the first ones are particular cases of the second ones, up to Fourier transforms. To show this, we produce a new proof of LU-factorizations which is valid for any Markov chain with a denumerable state space equipped with a pre-order relation. Factors have nice interpretations in terms of subordinated Markov chains. In particular, the LU-factorization of the potential matrix determines the law of the global minimum of the Markov chain.
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页码:1 / 37
页数:36
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