Random walks conditioned to stay in Weyl chambers of type C and D
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1. | Title | Title of document | Random walks conditioned to stay in Weyl chambers of type C and D |
2. | Creator | Author's name, affiliation, country | Wolfgang König; Technical University Berlin |
2. | Creator | Author's name, affiliation, country | Patrick Schmid; Universität Leipzig |
3. | Subject | Discipline(s) | |
3. | Subject | Keyword(s) | Conditional random walks, Doob $h$-transform, non-colliding probability, harmonic functions, réduite, Weyl chamber |
3. | Subject | Subject classification | 60G50, 60F17 |
4. | Description | Abstract | We construct the conditional versions of a multidimensional random walk given that it does not leave the Weyl chambers of type C and of type D, respectively, in terms of a Doob $h$-transform. Furthermore, we prove functional limit theorems for the rescaled random walks. This is an extension of recent work by Eichelsbacher and Koenig who studied the analogous conditioning for the Weyl chamber of type A. Our proof follows recent work by Denisov and Wachtel who used martingale properties and a strong approximation of random walks by Brownian motion. Therefore, we are able to keep minimal moment assumptions. Finally, we present an alternate function that is amenable to an $h$-transform in the Weyl chamber of type C. |
5. | Publisher | Organizing agency, location | |
6. | Contributor | Sponsor(s) | DFG-Graduiertenkolleg "Analysis, Geometrie und ihre Verbindung zu den Naturwissenschaften" |
7. | Date | (YYYY-MM-DD) | 2010-04-07 |
8. | Type | Status & genre | Peer-reviewed Article |
8. | Type | Type | |
9. | Format | File format | |
10. | Identifier | Uniform Resource Identifier | http://ecp.ejpecp.org/article/view/1560 |
10. | Identifier | Digital Object Identifier | 10.1214/ECP.v15-1560 |
11. | Source | Journal/conference title; vol., no. (year) | Electronic Communications in Probability; Vol 15 |
12. | Language | English=en | |
14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
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