A down-up chain with persistent labels on multifurcating trees
A down-up chain with persistent labels on multifurcating trees
复制标题
多叉树上带有持久标签的自下而上链
DOI:
10.1002/rsa.21185
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发表时间:
2023
影响因子:
1
通讯作者:
Sørensen F
中科院分区:
文献类型:
--
作者:
Sørensen F
In this article, we propose to study a general notion of a down‐up Markov chain for multifurcating trees with n$$ n $$ labeled leaves. We study in detail down‐up chains associated with the (α,γ)$$ \left(\alpha, \gamma \right) $$‐model of Chen et al. (Electron. J. Probab.14(2009), 400–430.), generalizing and further developing previous work by Forman et al. (arXiv:1802.00862, 2018; arXiv:1804.01205, 2018; arXiv:1809.07756, 2018; Random Struct. Algoritm.54(2020), 745–769; Electron. J. Probab.25(2020), 1–46.) in the binary special cases. The technique we deploy utilizes the construction of a growth process and a down‐up Markov chain on trees with planar structure. Our construction ensures that natural projections of the down‐up chain are Markov chains in their own right. We establish label dynamics that at the same time preserve the labeled alpha‐gamma distribution and keep the branch points between the k$$ k $$ smallest labels for order n2$$ {n}^2 $$ time steps for all k≥2$$ k\ge 2 $$. We conjecture the existence of diffusive scaling limits generalizing the “Aldous diffusion” by Forman et al. (arXiv:1802.00862, 2018; arXiv:1804.01205, 2018; arXiv:1809.07756, 2018.) as a continuum‐tree‐valued process and the “algebraic α$$ \alpha $$‐Ford tree evolution” by Löhr et al. (Ann. Probab.48(2020), 2565–2590.) and by Nussbaumer and Winter (arXiv:2006.09316, 2020.) as a process in a space of algebraic trees.
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影响因子:
1
作者:
Jason Schweinsberg
通讯作者:
Jason Schweinsberg
DOI:
10.1214/08-aop445
发表时间:
2008
期刊:
arXiv: Probability
影响因子:
--
作者:
J. Pitman;Matthias Winkel
通讯作者:
Matthias Winkel
影响因子:
1
作者:
Jason Schweinsberg
通讯作者:
Jason Schweinsberg
影响因子:
2.3
作者:
Pal, Soumik
通讯作者:
Pal, Soumik
影响因子:
2
作者:
Jason E. Fulman
通讯作者:
Jason E. Fulman