double IEEE classroom examples images pour prédicat d'orientation errors: wrong, crash, loop https://googleprojectzero.blogspot.com/2019/02/the-curious-case-of-convexity-confusion.html exact arithmetic BigRat, slow filters: interval, static Shewchuk expansion? pré-marche en double Simulation of simplicity (Algos résistant aux erreurs) CGAL Voronoi à poids additifs, multiplicatifs (https://www1.pub.informatik.uni-wuerzburg.de/eurocg2020/data/uploads/papers/eurocg20_paper_15.pdf). bissecteurs hyperbole/cercle Regular triangulations negative weight: add a constant to all Distance To Measure (only works for 1 or 2-manifolds) restricted Delaunay tangential complex LLL witness complex graph-induced complex + proches voisins voronoi hiérarchique kd-tree réduction de dimension: Johnson-Lindenstrauss LSH famille F de fonctions h tq si d(P,Q)P1, si d(P,Q)>cR, p(h(p)=h(q)) homotope: distance functions (Cech, alpha-complexe) et si le pb est encore plus dur -> persistance