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- W2159988978 abstract "In this paper we investigate the structure of the equilibriumstate of three-dimensional catalytic super-Brownian motion where the catalyst is itself a classical super-Brownian motion.We show that the reactant has an infinite local biodiversity or genetic abundance. This contrasts to the finite local biodiversity of the equilibriumof classical super-Brownian motion. Another question we address is that of extinction of the reactant in finite time or in the long-time limit in dimensions $d = 2,3$. Here we assume that the catalyst starts in the Lebesgue measure and the reactant starts in a finite measure.We show that there is extinction in the long-time limit if $d = 2 or 3$. There is, however, no finite time extinction if $d = 3$ (for $d = 2$, this problem is left open).This complements a result of Dawson and Fleischmann for $d = 1$ and again contrasts the behaviour of classical super-Brownian motion. As a key tool for both problems, we show that in $d = 3$ the reactant matter propagates everywhere in space immediately." @default.
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- W2159988978 date "2000-11-01" @default.
- W2159988978 modified "2023-09-27" @default.
- W2159988978 title "The biodiversity of catalytic super-Brownian motion" @default.
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- W2159988978 doi "https://doi.org/10.1214/aoap/1019487609" @default.
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