Stationary solutions and spreading speeds of nonlocal monostable equations in space periodic habitats

Shen, Wenxian; Zhang, Aijun

doi:10.1090/S0002-9939-2011-11011-6

Stationary solutions and spreading speeds of nonlocal monostable equations in space periodic habitats
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by Wenxian Shen and Aijun Zhang PDF

Proc. Amer. Math. Soc. 140 (2012), 1681-1696 Request permission

Abstract:

This paper deals with positive stationary solutions and spreading speeds of monostable equations with nonlocal dispersal in spatially periodic habitats. The existence and uniqueness of positive stationary solutions and the existence and characterization of spreading speeds of such equations with symmetric convolution kernels are established in the authors’ earlier work for the following cases: the nonlocal dispersal is nearly local; the periodic habitat is nearly globally homogeneous or it is nearly homogeneous in a region where it is most conducive to population growth. The above conditions guarantee the existence of principal eigenvalues of nonlocal dispersal operators associated to linearized equations at the trivial solution. In general, a nonlocal dispersal operator may not have a principal eigenvalue. In this paper, we extend our earlier results to general spatially periodic nonlocal monostable equations. As a consequence, it is seen that the spatial spreading feature is generic for monostable equations with nonlocal dispersal.

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