Displaying similar documents to “Multiparameter multifractional brownian motion : local nondeterminism and joint continuity of the local times”

Random walk local time approximated by a brownian sheet combined with an independent brownian motion

Endre Csáki, Miklós Csörgő, Antónia Földes, Pál Révész (2009)

Annales de l'I.H.P. Probabilités et statistiques

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Let (, ) be the local time of a simple symmetric random walk on the line. We give a strong approximation of the centered local time process (, )−(0, ) in terms of a brownian sheet and an independent Wiener process (brownian motion), time changed by an independent brownian local time. Some related results and consequences are also established.

Chaos expansions and local times.

David Nualart, Josep Vives (1992)

Publicacions Matemàtiques

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In this note we prove that the Local Time at zero for a multiparametric Wiener process belongs to the Sobolev space D for any ε > 0. We do this computing its Wiener chaos expansion. We see also that this expansion converges almost surely. Finally, using the same technique we prove similar results for a renormalized Local Time for the autointersections of a planar Brownian motion.

An integral test for the transience of a brownian path with limited local time

Itai Benjamini, Nathanaël Berestycki (2011)

Annales de l'I.H.P. Probabilités et statistiques

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We study a one-dimensional brownian motion conditioned on a self-repelling behaviour. Given a nondecreasing positive function (), ≥0, consider the measures obtained by conditioning a brownian path so that ≤(), for all ≤, where is the local time spent at the origin by time . It is shown that the measures are tight, and that any weak limit of as →∞ is transient provided that −3/2() is integrable. We conjecture...

Joint continuity of the local times of fractional brownian sheets

Antoine Ayache, Dongsheng Wu, Yimin Xiao (2008)

Annales de l'I.H.P. Probabilités et statistiques

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Let ={ (), ∈ℝ } be an (, )-fractional brownian sheet with index =( , …, )∈(0, 1) defined by ()=( (), …, ()) (∈ℝ ), where , …, are independent copies of a real-valued fractional brownian sheet . We prove that if <∑ ...

Exponential functionals of brownian motion and class-one Whittaker functions

Fabrice Baudoin, Neil O’Connell (2011)

Annales de l'I.H.P. Probabilités et statistiques

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We consider exponential functionals of a brownian motion with drift in ℝ, defined via a collection of linear functionals. We give a characterisation of the Laplace transform of their joint law as the unique bounded solution, up to a constant factor, to a Schrödinger-type partial differential equation. We derive a similar equation for the probability density. We then characterise all diffusions which can be interpreted as having the law of the brownian motion with drift conditioned on...