Abstract
We study the dynamics of a two-parameter family of noninvertible maps of the plane, derived from a model in population dynamics. We prove that, as one parameter varies with the other held fixed, the nonwandering set changes from the empty set to an unstable Cantor set on which the map is topologically equivalent to the shift endomorphism on two symbols. With the help of some numerical work, we trace the genealogies of the periodic points of the family of period ≤5, and describe their stability types and bifurcations. Among our results we find that the family has a fixed point which undergoes fold, flip and Hopf bifurcations, and that certain families of period five points are interconnected through a codimension-two cusp bifurcation.
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Whitley, D. On the periodic points of a two-parameter family of maps of the plane. Acta Appl Math 5, 279–311 (1986). https://doi.org/10.1007/BF00047345
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DOI: https://doi.org/10.1007/BF00047345