Essential versus $\#$-spectrum for smooth diffeomorphisms
نویسندگان
چکیده
منابع مشابه
Smooth Perfectness for the Group of Diffeomorphisms
Given the result of Herman, we provide a new elementary proof of the fact that the group of diffeomorphisms is a perfect and hence simple group. Moreover, we show that every diffeomorphism can be represented as a product of commutators f = [g1, h1] · · · [gm, hm] where the factors gi and hi can be chosen to depend smoothly on f . The elegance of our approach is due to the fact that we prove smo...
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ژورنال
عنوان ژورنال: Proceedings of the American Mathematical Society
سال: 1985
ISSN: 0002-9939
DOI: 10.1090/s0002-9939-1985-0774018-5