MARKOV PROCESSES CONDITIONED ON THEIR LOCATION AT LARGE EXPONENTIAL TIMES.
MARKOV PROCESSES CONDITIONED ON THEIR LOCATION AT LARGE EXPONENTIAL TIMES.
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马尔可夫过程以其在大指数倍时的位置为条件。
DOI:
10.1016/j.spa.2018.05.013
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发表时间:
2019
影响因子:
1.4
通讯作者:
Evans SN
中科院分区:
文献类型:
--
作者:
Evans SN
Suppose that (X t) t≥ 0 is a one-dimensional Brownian motion with negative drift− μ. It is possible to make sense of conditioning this process to be in the state 0 at an independent exponential random time and if we kill the conditioned process at the exponential time the resulting process is Markov. If we let the rate parameter of the random time go to 0, then the limit of the killed Markov process evolves like X conditioned to hit 0, after which time it behaves as X killed at the last time X visits 0. Equivalently, the limit process has the dynamics of the killed “bang–bang” Brownian motion that evolves like Brownian motion with positive drift+ μ when it is negative, like Brownian motion with negative drift− μ when it is positive, and is killed according to the local time spent at 0. An extension of this result holds in great generality for a Borel right process conditioned to be in some state a at an exponential random time, at which time it is killed. Our proofs involve understanding the Campbell measures associated with local times, the use of excursion theory, and the development of a suitable analogue of the “bang–bang” construction for a general Markov process. As examples, we consider the special case when the transient Borel right process is a one-dimensional diffusion. Characterizing the limiting conditioned and killed process via its infinitesimal generator leads to an investigation of the h-transforms of transient one-dimensional diffusion processes that goes beyond what is known and is of independent interest.
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影响因子:
1
作者:
H. Langer;W. Schenk
通讯作者:
W. Schenk
DOI:
10.1007/bf00532861
发表时间:
1974
期刊:
Zeitschrift für Wahrscheinlichkeitstheorie und Verwandte Gebiete
影响因子:
--
作者:
M. Jacobsen
通讯作者:
M. Jacobsen
DOI:
10.2307/2670145
发表时间:
1996-06
期刊:
--
影响因子:
--
作者:
A. Borodin;P. Salminen
通讯作者:
A. Borodin;P. Salminen
DOI:
10.1017/cbo9780511662980.004
发表时间:
1991
期刊:
Datenschutz und Datensicherheit - DuD
影响因子:
--
作者:
P. Fitzsimmons;M. Barlow;N. Bingham
通讯作者:
N. Bingham
DOI:
10.1007/978-3-540-89699-9
发表时间:
2009
期刊:
Datenschutz und Datensicherheit - DuD
影响因子:
--
作者:
B. Roynette;M. Yor
通讯作者:
M. Yor