International Journal of Differential Equations / 2011 / Article / Fig 1

Research Article

A Topological Approach to Bend-Twist Maps with Applications

Figure 1

A sketch of the problem in Wilson’s argument. We depict a sector of an annular domain in which there is a portion of a non-star-shaped curve where . The points of are moved radially to the points of with preservation of the area. The points in are not fixed points for . A similar situation is described by Martins and Ureña in [6, Figures 1-2].

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