Mathematics – Differential Geometry
Scientific paper
2011-04-19
Mathematics
Differential Geometry
12 pages
Scientific paper
We analyze sub-Riemannian and lightlike metrics from the point of view of
their rigidity as geometric structures. Following Cartan's and Gromov's formal
definitions, they are never rigid, yet, in generic cases, they naturally give
rise to rigid geometric structures!?
Bekkara Samir
Zeghib Abdelghani
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