A well-known formula for the spreading
speed of a discrete-time recursion model is extended to a class of
problems for which its validity was previously unknown. These
include migration models with moderately fat tails or fat tails.
Examples of such models are given.
Citation: Hans F. Weinberger, Xiao-Qiang Zhao. An extension of the formula for spreading speeds[J]. Mathematical Biosciences and Engineering, 2010, 7(1): 187-194. doi: 10.3934/mbe.2010.7.187
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Abstract
A well-known formula for the spreading
speed of a discrete-time recursion model is extended to a class of
problems for which its validity was previously unknown. These
include migration models with moderately fat tails or fat tails.
Examples of such models are given.