Comptes Rendus
Differential Geometry
Stable tangential family germs and singularities of their envelopes
[Germes stables de familles tangentielles et singularités de leurs enveloppes]
Comptes Rendus. Mathématique, Volume 341 (2005) no. 8, pp. 503-508.

Une famille tangentielle est un système de courbes régulières, émanées tangentiellement par une autre courbe régulière. Nous classifions les germes de familles tangentielles qui sont stables par déformations parmi les familles tangentielles, et nous étudions les singularités des enveloppes correspondantes. Nous étudions aussi certaines applications de nos résultats en Géométrie Différentielle.

A tangential family is a system of regular curves emanating tangentially from another regular curve. We classify tangential family germs which are stable under deformations among tangential families and we study singularities of their envelopes. We also discuss some applications of our results to Differential Geometry.

Reçu le :
Accepté le :
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DOI : 10.1016/j.crma.2005.09.014
Gianmarco Capitanio 1

1 CEREMADE, université Paris-Dauphine, place du M. De Lattre De Tassigny, 75775 Paris cedex 16, France
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Gianmarco Capitanio. Stable tangential family germs and singularities of their envelopes. Comptes Rendus. Mathématique, Volume 341 (2005) no. 8, pp. 503-508. doi : 10.1016/j.crma.2005.09.014. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2005.09.014/

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[4] G. Capitanio, Simple tangential family germs and perestroikas of their envelopes, Bull. Sci. Math., in press

[5] G. Capitanio, Legendrian graphs generated by tangential families, Proc. Edinburgh Math. Soc., in press

[6] J.-P. Dufour Familles de courbes planes différentiables, Topology, Volume 22 (1983) no. 4, pp. 449-474

[7] J. Itoh; K. Kiyohara The cut loci and the conjugate loci on ellipsoids, Manuscripta Math., Volume 114 (2004) no. 2, pp. 247-264

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