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Survival time of a heterogeneous random walk in a quadrant |
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| Authors: | Néjib Ben Salem Sami Mustapha Mohamed Sifi |
| Institution: | 1. Université de Tunis El Manar, Faculté des Sciences de Tunis, LR11ES11 Laboratoire d''analyse mathématiques et applications, 2092 Tunis, Tunisia;2. Centre de mathématiques de Jussieu, Université Pierre-et-Marie-Curie (Paris-6), tour 46, 55. étage, boîte 247, 4, place Jussieu, 75252 Paris cedex 05, France |
| Abstract: | We obtain upper Gaussian estimates of transition probabilities of inhomogeneous random walks on the positive quadrant. Among the most important steps in our proof are comparison arguments based on discrete variants of the Harnack principle and large deviations estimates. |
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