Sturm theory, Ghys theorem on zeroes of the Schwarzian derivative and flattening of Legendrian curves

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We discuss Ghys' theorem on 4 zeroes of the Schwarzian derivative and its relation with flattening points of Legendrian curves and Sturm theory.
14 pages, 7 postscript figures, anonymous ftp at ftp://cpt.univ-mrs.fr/ or gopher://cpt.univ-mrs.fr/

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Differential Geometry

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http://salesiana.dossiersoluciones.com/handle/123456789/152079

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/dg-ga/9510007
 http://arxiv.org/abs/dg-ga/9510007

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arXiv