A free boundary characterisation of the Root barrier for Markov processes
A free boundary characterisation of the Root barrier for Markov processes
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马尔可夫过程根势垒的自由边界表征
DOI:
10.1007/s00440-021-01052-6
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发表时间:
2021
影响因子:
2
通讯作者:
Gassiat P
中科院分区:
文献类型:
--
作者:
Gassiat P
We study the existence, optimality, and construction of non-randomised stopping times that solve the Skorokhod embedding problem (SEP) for Markov processes which satisfy a duality assumption. These stopping times are hitting times of space-time subsets, so-called Root barriers. Our main result is, besides the existence and optimality, a potential-theoretic characterisation of this Root barrier as a free boundary. If the generator of the Markov process is sufficiently regular, this reduces to an obstacle PDE that has the Root barrier as free boundary and thereby generalises previous results from one-dimensional diffusions to Markov processes. However, our characterisation always applies and allows, at least in principle, to compute the Root barrier by dynamic programming, even when the well-posedness of the informally associated obstacle PDE is not clear. Finally, we demonstrate the flexibility of our method by replacing time by an additive functional in Root’s construction. Already for multi-dimensional Brownian motion this leads to new class of constructive solutions of (SEP).
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DOI:
10.1007/bf00535137
发表时间:
1970-02
期刊:
Zeitschrift für Wahrscheinlichkeitstheorie und Verwandte Gebiete
影响因子:
--
作者:
D. Revuz
通讯作者:
D. Revuz
DOI:
10.1214/18-aap1454
发表时间:
2017
期刊:
The Annals of Applied Probability
影响因子:
--
作者:
L. Döring;L. Gonon;D.J. Prömel;O. Reichmann
通讯作者:
O. Reichmann
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
R. Getoor;M. Sharpe
通讯作者:
M. Sharpe
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Cox;D. Hobson
通讯作者:
D. Hobson
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
Neil Falkner
通讯作者:
Neil Falkner