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Computation of rotation numbers for a class of PL-circle homeomorphisms
Abdelhamid Adouani 1, Habib Marzougui 2
For the Abdelhamid Adouani collaboration(s)
(2011-05-25)

We give an explicite formula to compute rotation numbers of piecewise linear (PL) circle homeomorphisms f with the product of f-jumps in the break points contained in a same orbit is trivial. In particu- lar, a simple formulas are then given for particular PL-homeomorphisms such as the PL-Herman's examples. We also deduce that if the slopes of f are integral powers of an integer m 2 and break points and their images under f are m-adic rational numbers, then the rotation number of f is rational.
1:  Faculté des Sciences de Bizerte
Inst. Prép. Etud. Ingén. Bizerte
2:  Faculté des Sciences de Bizerte
Faculté des Sciences de Bizerte
Mathematics/Dynamical Systems
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