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arxiv: 1412.4291 · v1 · pith:VLVOYIAInew · submitted 2014-12-13 · 🧮 math.PR

GREM-like K processes on trees with infinite depth

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keywords levelprocessinfiniteprocessesclockgrem-likeinftylimit
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We take up the issue of deriving the limit as $n\to\infty$ of the GREM-like K process on a tree with $n$ levels. Under specific conditions on the parameters of the process, implying the martingality of a modification of the underlying clock process sequences, we obtain infinite level clock processes as nontrivial limits of the finite level clocks, and use them to construct a process on a suitable product space which is then shown to be the limit of the $n$ level K processes as $n\to\infty$. Some properties of the limiting, infinite level K process are established, like an expression for the asymptotic empirical measure of cylinders, giving information on the prospective equilibrium measure of the infinite level dynamics.

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