We propose a unified stochastic SIR model driven by Lévy noise. The model is structural enough to allow for time-dependency, nonlinearity, discontinuity, demography, and environmental disturbances. We present concise results on the existence and uniqueness of positive global solutions and investigate the extinction and persistence of the novel model. Examples and simulations are provided to illustrate the main results.
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http://dx.doi.org/10.1186/s13662-024-03818-3 | DOI Listing |
Elife
December 2024
Department of Molecular & Cell Biology, University of California at Berkeley, Berkeley, United States.
Commun Math Phys
November 2024
Oregon State University, Corvallis, OR 97331 USA.
Many integrable stochastic particle systems in one space dimension (such as TASEP-Totally Asymmetric Simple Exclusion Process-and its -deformation, the -TASEP) remain integrable if we equip each particle with its own speed parameter. In this work, we present intertwining relations between Markov transition operators of particle systems which differ by a permutation of the speed parameters. These relations generalize our previous works (Petrov and Saenz in Probab Theory Relat Fields 182:481-530, 2022), (Petrov in SIGMA 17(021):34, 2021), but here we employ a novel approach based on the Yang-Baxter equation for the higher spin stochastic six vertex model.
View Article and Find Full Text PDFPhys Life Rev
December 2024
School of Computing and Mathematical Sciences, Institute for Environmental Futures, University of Leicester, LE1 7RH, UK; Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia. Electronic address:
Traditionally, mathematical models in ecology placed an emphasis on asymptotic, long-term dynamics. However, a large number of recent studies highlighted the importance of transient dynamics in ecological and eco-evolutionary systems, in particular 'long transients' that can last for hundreds of generations or even longer. Many models as well as empirical studies indicated that a system can function for a long time in a certain state or regime (a 'metastable regime') but later exhibits an abrupt transition to another regime not preceded by any parameter change (or following the change that occurred long before the transition).
View Article and Find Full Text PDFPhys Rev E
October 2024
Institute of Environmental Assessment and Water Research (IDAEA), Spanish National Research Council (CSIC), Carrer Jordi Girona 18, 08034 Barcelona, Spain.
Processes under reset, where realizations are interrupted according to some stochastic rule and restarted from the initial state, find broad application in modeling physical, chemical, and biological phenomena and in designing search strategies. While a wealth of theoretical results has been recently obtained, current derivations tend to focus on specific processes, obscuring the general principles and preventing broad applicability. We present a unified approach to those observables of stochastic processes under reset that take the form of averages of functionals depending on the most recent renewal period.
View Article and Find Full Text PDFPhys Rev E
October 2024
Institute of Theoretical Physics, Wrocław University of Science and Technology, 50-370 Wrocław, Poland.
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