Electronic Journal of Probability
- Electron. J. Probab.
- Volume 23 (2018), paper no. 71, 36 pp.
SuperBrownian motion and the spatial Lambda-Fleming-Viot process
It is well known that the dynamics of a subpopulation of individuals of a rare type in a Wright-Fisher diffusion can be approximated by a Feller branching process. Here we establish an analogue of that result for a spatially distributed population whose dynamics are described by a spatial Lambda-Fleming-Viot process (SLFV). The subpopulation of rare individuals is then approximated by a superBrownian motion. This result mirrors , where it is shown that when suitably rescaled, sparse voter models converge to superBrownian motion. We also prove the somewhat more surprising result, that by choosing the dynamics of the SLFV appropriately we can recover superBrownian motion with stable branching in an analogous way. This is a spatial analogue of (a special case of) results of , who show that the generalised Fleming-Viot process that is dual to the beta-coalescent, when suitably rescaled, converges to a continuous state branching process with stable branching mechanism.
Electron. J. Probab., Volume 23 (2018), paper no. 71, 36 pp.
Received: 29 May 2017
Accepted: 25 June 2018
First available in Project Euclid: 26 July 2018
Permanent link to this document
Digital Object Identifier
Mathematical Reviews number (MathSciNet)
Zentralblatt MATH identifier
Primary: 60F05: Central limit and other weak theorems 60G57: Random measures 60J25: Continuous-time Markov processes on general state spaces 60J68: Superprocesses 60J80: Branching processes (Galton-Watson, birth-and-death, etc.)
Secondary: 60G51: Processes with independent increments; Lévy processes 60G55: Point processes 60J75: Jump processes 92D10f
Chetwynd-Diggle, Jonathan A.; Etheridge, Alison M. SuperBrownian motion and the spatial Lambda-Fleming-Viot process. Electron. J. Probab. 23 (2018), paper no. 71, 36 pp. doi:10.1214/18-EJP191. https://projecteuclid.org/euclid.ejp/1532570599