Thursday, May 2, 2013

Reducibility of quasi-periodic cocycles under a Brjuno-Rüssmann arithmetical condition

Claire Chavaudret
(Université de Nice Sophia Antipolis)

Abstract: We will show that linear quasi-periodic systems with coefficients in SL(2,R) and with arbitrarily many frequencies are reducible under an arithmetical condition on the frequency and on the rotation number which is weaker than the diophantine condition and similar to the usual Brjuno condition. This gives an extension of a theorem by Eliasson. (joint work with S. Marmi)

Thursday, May 2, 2013
Time: 14h30
Room: Sala IAPMEI, Edificio Quelhas, ISEG