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    • Shy Couplings 

      Benjamini, Itai; Burdzy, Krzysztof; Chen, Zhen-Qing (2005)
      A pair (X; Y) of Markov processes is called a Markov coupling if X and Y have the same transition probabilities and (X;Y) is a Markov process. We say that a coupling is "shy" if there exists a (random) [Epsilon] > 0 such ...