All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Page 1

Displaying 1 – 9 of 9

Showing per page

Real deformations and invariants of map-germs

J. H. Rieger, M. A. S. Ruas, R. Wik Atique (2008)

Banach Center Publications

A stable deformation f t of a real map-germ f : ℝ ⁿ , 0 → ℝ p , 0 is said to be an M-deformation if all isolated stable (local and multi-local) singularities of its complexification f ℂ t are real. A related notion is that of a good real perturbation f t of f (studied e.g. by Mond and his coworkers) for which the homology of the image (for n < p) or discriminant (for n ≥ p) of f t coincides with that of f C t . The class of map germs having an M-deformation is, in some sense, much larger than the one having a good real perturbation....

Remarks on the symmetries of planar fronts.

F. Aicardi (1995)

Revista Matemática de la Universidad Complutense de Madrid

A front is the projection on the plane of a Legendrian immersion of a circle in the space of the contact elements of that plane. I analyze the symmetries of a generic front with respect to the group generated by the involutions reversing the orientation of the plane, the orientation of the preimage circle and the coorientation of the contact plane.

Currently displaying 1 – 9 of 9

Page 1