• Media type: E-Book; Report; Text
  • Title: A logistic equation with nonlocal interactions
  • Contributor: Caffarelli, Luis [Author]; Dipierro, Serena [Author]; Valdinoci, Enrico [Author]
  • imprint: Weierstrass Institute for Applied Analysis and Stochastics publication server, 2016
  • Language: English
  • DOI: https://doi.org/10.20347/WIAS.PREPRINT.2216
  • Keywords: 35Q92 ; article ; 35R11 ; Mathematical models for biology -- local and nonlocal dispersals -- spectral analysis -- existence of nontrivial solutions ; 60G22 ; 46N60
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  • Description: We consider here a logistic equation, modeling processes of nonlocal character both in the diffusion and proliferation terms. More precisely, for populations that propagate according to a L\'evy process and can reach resources in a neighborhood of their position, we compare (and find explicit threshold for survival) the local and nonlocal case. As ambient space, we can consider: \begin{itemize} \item bounded domains, \item periodic environments, \item transition problems, where the environment consists of a block of infinitesimal diffusion and an adjacent nonlocal one. \end{itemize} In each of these cases, we analyze the existence/nonexistence of solutions in terms of the spectral properties of the domain. In particular, we give a detailed description of the fact that nonlocal populations may better adapt to sparse resources and small environments.