Notes de cours ,
A few open problems related to modular properties of
determinants of symmetric matrices defined by binomial coefficients
A short description of the main result of my preprint "Counting Triangulations of Configurations"
An applet written by my collegue Jean-Marc Decauwert which allows
you to experiment with the Orchard relation (an equivalence relation
on a finite set of points in R^2 which does not contain three aligned points).
(genericity), described in "Le cocycle du verger", CRAS 338 (2004), 187-190
and in "The Orchard relation of planar configurations of points I,II
(coauthor D. Garber) to appear in Geombinatorics (I believe).
You can create a point by a mouse-click (cr'eer),
move a point (click on a point and drag it with clicked mouse) (d'eplacer)
or remove a point (supprimer).
Enabling the option "afficher" displays all lines determined by
pairs of distinct points.
Roland Bacher, Institut Fourier (CNRS UMR 5582), 100 rue des Maths,
Université de Grenoble I, 38402 Saint Martin d'Hères
Tel: ( 33 or 0 ) 4 76 51 43 10.
bacher at fourier dot ujf-grenoble.fr