Monthly Archives: May 2014

Ricci flow 1. Results To extend Ricci flow to singular spaces, one needs continuity of Ricci flow with respect to the metric, say, is Gromov-Hausdorff topology. But this fails. We introduce a variant of Ricci flow that has the required … Continue reading →

Approximation of controlled mechanical systems by Riemannian metrics and generalisations 1. Systèmes rapidement oscillants Donnée : champs de vecteurs, minimisation de la norme du contr\^ole. Ou au contraire, à contr\^oles bornés par 1, minimiser le temps. Pour des champs indépendants … Continue reading →