Lyapunov type inequalities for Hammerstein integral equations and applications to population dynamics

Lyapunov type inequalities for Hammerstein integral equations and applications to population dynamics
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Hammerstein积分方程的Lyapunov型不等式及其在人口动态中的应用

DOI:
10.3934/dcdsb.2018256
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发表时间:
2019
影响因子:
1.2
通讯作者:
Lin Wei
Lin Wei
中科院分区:
数学4区
文献类型:
--
作者:
Lan Kunquan;Lin Wei

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建立了(线性或非线性)Hammerstein积分方程的李雅普诺夫型不等式,并将其应用于具有一般分离边界条件的二阶微分方程.这些新的不等式为Hammerstein积分方程和边值问题存在非零非负解提供了必要条件。作为这些不等式在非线性常微分方程中的应用,我们得到了居住在一维非均匀环境中种群的灭绝准则和最优栖息地位置,该环境由具有空间变化增长率和外部强迫的反应扩散方程所控制。
Lyapunov type inequalities for (linear or nonlinear) Hammerstein integral equations are established and applied to second order differential equations (ODEs) with general separated boundary conditions. These new inequalities provide necessary conditions for the Hammerstein integral equations and these boundary value problems to have nonzero nonnegative solutions. As applications of these inequalities for nonlinear ODEs, we obtain extinction criteria and optimal locations of favorable habitats for populations inhabiting one dimensional heterogeneous environments governed by reaction-diffusion equations with spatially varying growth rates and external forcing.
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