• Media type: E-Article; Text
  • Title: Trimmed trees and embedded particle systems
  • Contributor: Fleischmann, Klaus [Author]; Swart, Jan [Author]
  • imprint: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2004
  • Language: English
  • DOI: https://doi.org/10.1214/009117904000000090
  • ISSN: 0091-1798
  • Keywords: (Historical) superprocess -- binary branching -- Poissonization -- embedded particle system -- trimmed tree -- compensated h-transform -- finite ancestry property ; article
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  • Description: In a supercritical branching particle system, the trimmed tree consists of those particles which have descendants at all times. We develop this concept in the superprocess setting. For a class of continuous superprocesses with Feller underlying motion on compact spaces, we identify the trimmed tree, which turns out to be a binary splitting particle system with a new underlying motion that is a compensated h-transform of the old one. We show how trimmed trees may be estimated from above by embedded binary branching particle systems.