Classification of symmetric caustics I: symplectic equivalence

  • Staszek Janeczko
  • Mark Roberts
Conference paper
Part of the Lecture Notes in Mathematics book series (LNM, volume 1463)


We generalise the classification theory of Arnold and Zakalyukin for singularities of Lagrange projections to projections that commute with a symplectic action of a compact Lie group. The theory is applied to the classification of infinitesimally stable corank 1 projections with ℤ2 symmetry. However examples show that even in very low dimensions there exist generic projections which are not infinitesimally stable.


Tangent Space Trivial Extension Finite Codimension Symplectic Action Finite Determinacy 
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Copyright information

© Springer-Verlag 1991

Authors and Affiliations

  • Staszek Janeczko
  • Mark Roberts

There are no affiliations available

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