Stability of closed characteristics on compact hypersurfaces in R under pinching condition
نویسنده
چکیده
In this article, let Σ ⊂ R be a compact convex hypersurface which is (r,R)-pinched with R r < √ 3 2 . Then Σ carries at least two strictly elliptic closed characteristics; moreover, Σ carries at least 2[ 4 ] non-hyperbolic closed characteristics.
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تاریخ انتشار 2008