Abstract
Consider a stochastic process that lives on n-semiaxes joined at the origin. On each ray it behaves as one dimensional Brownian Motion and at the origin it chooses a ray uniformly at random (Kirchhoff condition). The principal results are the computation of the exit probabilities and certain other probabilistic quantities regarding exit and occupation times.
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Papanicolaou, V.G., Papageorgiou, E.G. & Lepipas, D.C. Random Motion on Simple Graphs. Methodol Comput Appl Probab 14, 285–297 (2012). https://doi.org/10.1007/s11009-010-9203-x
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DOI: https://doi.org/10.1007/s11009-010-9203-x