The standard additive coalescent

Abstract
Regard an element of the set\Delta := f(x 1 ; x 2 ; : : :) : x 1 x 2 : : : 0;Xix i = 1gas a fragmentation of unit mass into clusters of masses x i . The additivecoalescent of Evans and Pitman (1997) is the \Delta-valued Markov processin which pairs of clusters of masses fx i ; x j g merge into a cluster of massx i +x j at rate x i +x j . They showed that a version (X1(t); \Gamma1 ! t !1) of this process arises as a n !1 weak limit of the process startedat time \Gamma12...

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