Results 31 to 40 of about 2,761 (145)
The threshold of a stochastic SIQS epidemic model
, 2014 In this paper, we discuss the dynamics of a stochastic SIQS epidemic model. When the noise is large, the infective decays exponentially to zero regardless of the magnitude of R0. When the noise is small, sufficient conditions for extinction exponentially
Yanni Pang, Yuecai Han, Wenjin Li
semanticscholar +1 more source
Second‐order neutral stochastic evolution equations with heredity
International Journal of Stochastic Analysis, Volume 2004, Issue 2, Page 177-192, 2004., 2004 Existence, continuous dependence, and approximation results are established for a class of abstract second‐order neutral stochastic evolution equations with heredity in a real separable Hilbert space. A related integro‐differential equation is also mentioned, as well as an example illustrating the theory.
Mark A. McKibben
wiley +1 more source
Coexistence for a kind of stochastic three-species competitive models
Open Mathematics, 2019 The coexistence of species sustains the ecological balance in nature. This paper focuses on sufficient conditions for the coexistence of a three-species stochastic competitive model, where the model has non-linear diffusion parts.
Huang Nantian +3 more
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Backward stochastic differential equations with stochastic monotone coefficients
International Journal of Stochastic Analysis, Volume 2004, Issue 4, Page 317-335, 2004., 2004 We prove an existence and uniqueness result for backward stochastic differential equations whose coefficients satisfy a stochastic monotonicity condition. In this setting, we deal with both constant and random terminal times. In the random case, the terminal time is allowed to take infinite values.
K. Bahlali, A. Elouaflin, M. N′zi
wiley +1 more source
Journal of Biological Dynamics, 2023 In this paper, a new stochastic four-species predator-prey model with disease in the first prey is proposed and studied. First, we present the stochastic model with some biological assumptions and establish the existence of globally positive solutions ...
C. Gokila +3 more
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High-Order Energy-Preserving Methods for Stochastic Poisson Systems
East Asian Journal on Applied Mathematics, 2019 A family of explicit parametric stochastic Runge-Kutta methods for stochastic Poisson systems is developed. The methods are based on perturbed collocation methods with truncated random variables and are energy-preserving.
Xiuyan Li, Qiang Ma, X. Ding
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Some estimates on exponentials of solutions to stochastic differential equations
International Journal of Stochastic Analysis, Volume 2004, Issue 4, Page 287-316, 2004., 2004 Exponential of functionals of solutions to certain stochastic differential equations (SDEs) plays an interesting role in some mathematical finance problems. The purpose of this paper is to establish some estimates for these exponentials.
Jiongmin Yong
wiley +1 more source
A linear numerical scheme for nonlinear BSDEs with uniformly continuous coefficients
Journal of Applied Mathematics, Volume 2004, Issue 6, Page 461-477, 2004., 2004 We attempt to present a new numerical approach to solve nonlinear backward stochastic differential equations. First, we present some definitions and theorems to obtain the condition, from which we can approximate the nonlinear term of the backward stochastic differential equation (BSDE) and we get a continuous piecewise linear BSDE corresponding to the
Omid. S. Fard, Ali V. Kamyad
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Stochastic differential equations with Sobolev drifts and driven by $\alpha$-stable processes
, 2013 In this article we prove the pathwise uniqueness for stochastic differential equations in Rd with time-dependent Sobolev drifts, and driven by symmetric α-stable processes provided that α ∈ (1,2) and its spectral measure is non-degenerate. In particular,
Xicheng Zhang
semanticscholar +1 more source
Stochastic flows with interaction and measure‐valued processes
International Journal of Mathematics and Mathematical Sciences, Volume 2003, Issue 63, Page 3963-3977, 2003., 2003 We consider the new class of the Markov measure‐valued stochastic processes with constant mass. We give the construction of such processes with the family of the probabilities which describe the motion of single particles. We also consider examples related to stochastic flows with the interactions and the local times for such processes.
Andrey A. Dorogovtsev
wiley +1 more source