Department of Physics

University of Wisconsin, Madison

Ref: J. C. Sprott, Nonlinear
Dynamics, Psychology, and Life Sciences **16**, 387-395
(2012).

The complete paper is available in PDF format.

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Fig. 1. Population density of people (

Fig. 2. Population density of people (

Fig. 3. Population density of people as a function of position around the ring (

Fig. 4. A projection of the strange attractor at a typical place around the ring, showing the population density of rats (

Fig. 5. Attractors showing a progression from a simple limit cycle at