Monthly Archives: February 2015

Notes of Samuel Lelièvre’s Orsay lecture

Groupes aléatoires avec Moon Duchin, Kasia Jankiewicz, Shelby Kilmer, John Mackay, Andrew Sánchez. Résultat d’un cluster d’undergraduates qui a eu lieu l’an dernier à Tufts, Boston (12 participants, 6 semaines). 1. Le modèle à densité de Gromov Dans la sphère … Continue reading

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Notes of David Hume’s Orsay lecture

Expanders and separation How different can expanders be ? 1. Expanders Definition 1 An -expander is a sequence of finite graphs where – each has Cheeger constant . A -expander is a sequence of finite graphs where – each has … Continue reading

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