Geodesic
Normal Forms of the Whitney Umbrella with Respect to the Contact Group Preserving a Cone
Funkcionalʹnyj analiz i ego priloženiâ, Tome 31 (1997) no. 2, pp. 91-94.

Voir la notice de l'article provenant de la source Math-Net.Ru

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B. Z. Shapiro. Normal Forms of the Whitney Umbrella with Respect to the Contact Group Preserving a Cone. Funkcionalʹnyj analiz i ego priloženiâ, Tome 31 (1997) no. 2, pp. 91-94. http://geodesic.mathdoc.fr/item/FAA_1997_31_2_a14/

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