Blowing-up of deterministic fixed points in stochastic population dynamics
We discuss the stochastic dynamics of biological (and other) populations presenting a limit behaviour for large environments (called deterministic limit) and its relation with the dynamics in the limit. The discussion is circumscribed to linearly stable fixed points of the deterministic dynamics, an...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00255564_v209_n2_p319_Natiello http://hdl.handle.net/20.500.12110/paper_00255564_v209_n2_p319_Natiello |
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paper:paper_00255564_v209_n2_p319_Natiello2023-06-08T14:53:10Z Blowing-up of deterministic fixed points in stochastic population dynamics Natiello, Mario Alberto Solari, Hernán Gustavo Deterministic limit Population dynamics Stochastic Eigenvalues and eigenfunctions Lyapunov functions Random processes Stiffness matrix System stability Deterministic dynamics Deterministic limit Stochastic instability Population dynamics eigenvalue oscillation population dynamics stochasticity article nonhuman oscillation population density population dynamics species extinction statistical analysis statistical model stochastic model Animals Humans Markov Chains Mathematics Models, Statistical Population Dynamics Stochastic Processes We discuss the stochastic dynamics of biological (and other) populations presenting a limit behaviour for large environments (called deterministic limit) and its relation with the dynamics in the limit. The discussion is circumscribed to linearly stable fixed points of the deterministic dynamics, and it is shown that the cases of extinction and non-extinction equilibriums present different features. Mainly, non-extinction equilibria have associated a region of stochastic instability surrounded by a region of stochastic stability. The instability region does not exist in the case of extinction fixed points, and a linear Lyapunov function can be associated with them. Stochastically sustained oscillations of two subpopulations are also discussed in the case of complex eigenvalues of the stability matrix of the deterministic system. © 2007 Elsevier Inc. All rights reserved. Fil:Natiello, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Solari, H.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2007 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00255564_v209_n2_p319_Natiello http://hdl.handle.net/20.500.12110/paper_00255564_v209_n2_p319_Natiello |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Deterministic limit Population dynamics Stochastic Eigenvalues and eigenfunctions Lyapunov functions Random processes Stiffness matrix System stability Deterministic dynamics Deterministic limit Stochastic instability Population dynamics eigenvalue oscillation population dynamics stochasticity article nonhuman oscillation population density population dynamics species extinction statistical analysis statistical model stochastic model Animals Humans Markov Chains Mathematics Models, Statistical Population Dynamics Stochastic Processes |
spellingShingle |
Deterministic limit Population dynamics Stochastic Eigenvalues and eigenfunctions Lyapunov functions Random processes Stiffness matrix System stability Deterministic dynamics Deterministic limit Stochastic instability Population dynamics eigenvalue oscillation population dynamics stochasticity article nonhuman oscillation population density population dynamics species extinction statistical analysis statistical model stochastic model Animals Humans Markov Chains Mathematics Models, Statistical Population Dynamics Stochastic Processes Natiello, Mario Alberto Solari, Hernán Gustavo Blowing-up of deterministic fixed points in stochastic population dynamics |
topic_facet |
Deterministic limit Population dynamics Stochastic Eigenvalues and eigenfunctions Lyapunov functions Random processes Stiffness matrix System stability Deterministic dynamics Deterministic limit Stochastic instability Population dynamics eigenvalue oscillation population dynamics stochasticity article nonhuman oscillation population density population dynamics species extinction statistical analysis statistical model stochastic model Animals Humans Markov Chains Mathematics Models, Statistical Population Dynamics Stochastic Processes |
description |
We discuss the stochastic dynamics of biological (and other) populations presenting a limit behaviour for large environments (called deterministic limit) and its relation with the dynamics in the limit. The discussion is circumscribed to linearly stable fixed points of the deterministic dynamics, and it is shown that the cases of extinction and non-extinction equilibriums present different features. Mainly, non-extinction equilibria have associated a region of stochastic instability surrounded by a region of stochastic stability. The instability region does not exist in the case of extinction fixed points, and a linear Lyapunov function can be associated with them. Stochastically sustained oscillations of two subpopulations are also discussed in the case of complex eigenvalues of the stability matrix of the deterministic system. © 2007 Elsevier Inc. All rights reserved. |
author |
Natiello, Mario Alberto Solari, Hernán Gustavo |
author_facet |
Natiello, Mario Alberto Solari, Hernán Gustavo |
author_sort |
Natiello, Mario Alberto |
title |
Blowing-up of deterministic fixed points in stochastic population dynamics |
title_short |
Blowing-up of deterministic fixed points in stochastic population dynamics |
title_full |
Blowing-up of deterministic fixed points in stochastic population dynamics |
title_fullStr |
Blowing-up of deterministic fixed points in stochastic population dynamics |
title_full_unstemmed |
Blowing-up of deterministic fixed points in stochastic population dynamics |
title_sort |
blowing-up of deterministic fixed points in stochastic population dynamics |
publishDate |
2007 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00255564_v209_n2_p319_Natiello http://hdl.handle.net/20.500.12110/paper_00255564_v209_n2_p319_Natiello |
work_keys_str_mv |
AT natiellomarioalberto blowingupofdeterministicfixedpointsinstochasticpopulationdynamics AT solarihernangustavo blowingupofdeterministicfixedpointsinstochasticpopulationdynamics |
_version_ |
1768544855806443520 |