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Coagulation Processes with Gibbsian Time Evolution

Published online by Cambridge University Press:  04 February 2016

Boris L. Granovsky*
Affiliation:
Technion - Israel Institute of Technology
Alexander V. Kryvoshaev*
Affiliation:
Technion - Israel Institute of Technology
*
Postal address: Department of Mathematics, Technion - Israel Institute of Technology, Haifa 32000, Israel.
Postal address: Department of Mathematics, Technion - Israel Institute of Technology, Haifa 32000, Israel.
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Abstract

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We prove that a stochastic process of pure coagulation has at any time t ≥ 0 a time-dependent Gibbs distribution if and only if the rates ψ(i, j) of single coagulations are of the form ψ(i; j) = if(j) + jf(i), where f is an arbitrary nonnegative function on the set of positive integers. We also obtain a recurrence relation for weights of these Gibbs distributions that allow us to derive the general form of the solution and the explicit solutions in three particular cases of the function f. For the three corresponding models, we study the probability of coagulation into one giant cluster by time t > 0.

Type
Research Article
Copyright
© Applied Probability Trust 

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