University of Leeds

Department of Applied Mathematics and
Centre for Nonlinear Studies

Friday January 19th, 2007
3.00 pm in LT11 of the Roger Stevens Building.


Paolo Santini
University of Roma "La Sapienza"
e-mail: Paolo.Santini@roma1.infn.it

Cyclic motions on the Riemann surface of the anharmonic oscillator; isochrony and fractals.

We study the complexification of the one-dimensional Newtonian particle in a monomial potential. We discuss cyclic motions on the associated Riemann surface, corresponding to a class of Newtonian dynamics in the plane. We also introduce the "center map", a one-parameter family of 2-d mappings describing the motion of the center of the circle, as a convenient representation of the cyclic dynamics. Computer experiments show a typical multifractal behavior with periodicity islands.

(joint work with P. G. Grinevich)


Contact A.P. Fordy (email: allan@maths.leeds.ac.uk ) for further details.

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