La petite musique de la géométrie Intégrale

( R.Langevin Décembre 1998) (postcript version)

Integral geometry from Buffon to the use

of twentieth century mathematics

(R.Langevin 2011) (pdf version)

Dynamical systems in dimension 2 and 3
Conjugacy invariants and classification

(C.Bonatti V.Grines and R. Langevin March 15 2001) (postcript version)

Set of spheres and applications

R. Langevin, July 2004 (postcript version)

The geometry of canal surfaces and the length of curves in de Sitter space

Rémi Langevin and Gil Solanes, June 2009 (pdf version)

Conformal arc-length via osculating circles

Rémi Langevin and Jun O'Hara, March 2008 (pdf version)

Canal foliations of  S3

Rémi Langevin and Pawel Walczak, March 2009 (pdf version)

Dynamical behaviour of Darboux curve

Ronaldo Garcia, Rémi Langevin and Pawel Walczak, July 2009 (pdf version)