On 30th March, 10:30-11:30, in the Salle de Profs, Bruno will give the 6th talk in our working group on manifolds with lower bounds on Ricci curvature. He will describe some of the following topics, from Chapter 9 of Cheeger’s notes: almost volume cones and almost metric cones, Reifenberg’s method, tangent cones at infinity.

On 9th March, at the earlier time than normal of 10h-12h, but in the usual location, the Salle de Profs, Michael Khanevsky will give the fifth talk in our working group on manifolds with lower bounds on Ricci curvature. Michael will discuss the almost splitting theorem.

On 2nd March, 10h30-12h30, Salle des Profs, Ben Sibley gave the fourth talk in the working group on manifolds with lower Ricci bounds. He discussed the Cheng-Yau gradient estimate, quantitative maximum principles and the existence of special cut-off functions, all necessary technical ingredients for the almost splitting theorem which will be the topic of a future talk.