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A scaling proof for Walsh's Brownian motion extended arc-sine law
Stavros Vakeroudis1, 2, Marc Yor1, 3

We present a new proof of the extended arc-sine law related to Walsh's Brownian motion, known also as Brownian spider. The main argument mimics the scaling property used previously, in particular by D. Williams in the 1-dimensional Brownian case, which can be generalized to the multivariate case. A discussion concerning the time spent positive by a skew Bessel process is also presented.
1 :  LPMA - Laboratoire de Probabilités et Modèles Aléatoires
2 :  School of Mathematics - Department of Mathematics [Manchester]
3 :  IUF - Institut Universitaire de France
Arc-sine law – Brownian spider – Skew Bessel process – Stable variables – Subordinators – Walsh Brownian motion