Mathematics – Dynamical Systems
Scientific paper
2001-10-11
Mathematics
Dynamical Systems
5 pages
Scientific paper
Let $M$ be an $n$-dimensional manifold supporting a quasi Anosov
diffeomorphism. If $n=3$ then either $M={\mathbb T}^3$, in which case the
diffeomorphisms is Anosov, or else its fundamental group contains a copy of
${\mathbb Z} ^6$. If $n=4$ then $\Pi_1(M)$ contains a copy of ${\mathbb Z} ^4$,
provided that the diffeomorphism is not Anosov.
Hertz Jana Rodriguez
Ures Raul
Vieitez Jose L.
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