Geodesic
Simple Coisotropic Caustics
Contemporary Mathematics. Fundamental Directions, Proceedings of the International Conference on Differential and Functional-Differential Equations — Satellite of International Congress of Mathematicians ICM-2002 (Moscow, MAI, 11–17 August, 2002). Part 2, Tome 2 (2003), pp. 45-56.

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A complete proof of local classifications up to symplectomorphisms of simple stable pairs consisting of a Lagrangian submanifold and a coisotropic fibration is presented. This generalization of Arnold's classification of simple Lagrangian projections provides all discriminants of $A$, $B$, $C$, $D$, $E$, and F Weil groups. 
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V. M. Zakalyukin. Simple Coisotropic Caustics. Contemporary Mathematics. Fundamental Directions, Proceedings of the International Conference on Differential and Functional-Differential Equations — Satellite of International Congress of Mathematicians ICM-2002 (Moscow, MAI, 11–17 August, 2002). Part 2, Tome 2 (2003), pp. 45-56. http://geodesic.mathdoc.fr/item/CMFD_2003_2_a1/

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[6] Zakalyukin V. M., “Simple coisotropic projections and caustics”, Prog. Math., 2 (2001), 575–583 | MR