Geodesic
Local contractivity of the process of a player rating variation in the Elo model with one adversary
Diskretnaya Matematika, Tome 27 (2015) no. 1, pp. 3-21.

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We study the process of variation of a player rating in an infinite series of games with the same adversary in the Elo rating model. This process is shown to have a stationary distribution, an upper estimate of the rate of convergence to which is established. In a previous paper by the author, the existence of a limit distribution was proved under more stringent assumptions on the parameters of a rating model.
Keywords: Markov chains, iterated function system, limit distributions, local contractivity, models of rating systems. 
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V. A. Avdeev. Local contractivity of the process of a player rating variation in the Elo model with one adversary. Diskretnaya Matematika, Tome 27 (2015) no. 1, pp. 3-21. http://geodesic.mathdoc.fr/item/DM_2015_27_1_a0/

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