A Global Intrinsic Characterization of Brownian Local Time
Perkins, Edwin
Ann. Probab., Tome 9 (1981) no. 6, p. 800-817 / Harvested from Project Euclid
Let $B(t)$ be a Brownian motion with local time $s(t, x)$. Paul Levy showed that for each $x, s(t, x)$ is a.s. equal to the limit as $\delta$ approaches zero of $\delta^{1/2}$ times the number of excursions from $x$, exceeding $\delta$ in length, that are completed by $B$ up to time $t$. The aim of the present paper is to show that the exceptional null sets, which may depend on $x$, can be combined into a single null set off which the above convergence is uniform in $x$. The proof uses nonstandard analysis to construct a simple combinatorial representation for the local time of a Brownian motion constructed by R. M. Anderson.
Publié le : 1981-10-14
Classification:  Local time,  Brownian motion,  nonstandard analysis,  02H25,  60J55,  60J65,  60C05,  60G45
@article{1176994309,
     author = {Perkins, Edwin},
     title = {A Global Intrinsic Characterization of Brownian Local Time},
     journal = {Ann. Probab.},
     volume = {9},
     number = {6},
     year = {1981},
     pages = { 800-817},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1176994309}
}
Perkins, Edwin. A Global Intrinsic Characterization of Brownian Local Time. Ann. Probab., Tome 9 (1981) no. 6, pp.  800-817. http://gdmltest.u-ga.fr/item/1176994309/