Abstract
We study a free boundary problem with a type of multi-stable nonlinearity and a Dirichlet boundary condition, the model describes the spreading of chemical substance or species, when the density of species/chemical substance exceeds some critical number, the species/chemical substance will spread outside, but the environment at the right moving boundary \(x=h(t)\) is not very kind for spreading because of some bad factors, this produces a decay rate. We mainly study the long time behavior of the solution, when the decay rate is small, we have four spreading cases: the solution is either big spreading, or small spreading, or in the big equilibrium state, or small equilibrium state. Besides this, we also have two different trichotomy results: big spreading, big equilibrium state (resp. small spreading) and small equilibrium state (resp. medium equilibrium state), we also have a big-small spreading result and another dichotomy result.
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Cai, J., Xu, P. & Xu, L. Asymptotic Behavior of Solutions for Multi-stable Equation with Dirichlet Boundary Condition. Mediterr. J. Math. 20, 299 (2023). https://doi.org/10.1007/s00009-023-02495-y
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DOI: https://doi.org/10.1007/s00009-023-02495-y