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Название: Correlation Lengths for Oriented Percolation
Авторы: Durrett R., Schonmann R.H., Tanaka N.I.
Oriented percolation has two correlation lengths, one in the "'space" and one in the "time" direction. In this paper we define these quantities for the two-dimensional model in terms of the exponential decay of suitably chosen quantities, and study the relationship between the various definitions. The definitions are used in a companion paper to prove inequalities between critical exponents.