
Recent Posts
Recent Comments
metric2011 on Notes of Sa’ar Hersonsky… CH on Videos Stefan Wenger on Notes of Stefan Wenger’s… Stefan Wenger on Notes of Stefan Wenger’s… Stefan Wenger on Notes of Stefan Wenger’s… Archives
 October 2017
 June 2017
 May 2017
 April 2017
 March 2017
 February 2017
 January 2017
 March 2016
 February 2016
 October 2015
 August 2015
 February 2015
 November 2014
 October 2014
 September 2014
 June 2014
 May 2014
 April 2014
 March 2014
 February 2014
 January 2014
 December 2013
 November 2013
 October 2013
 July 2013
 May 2013
 February 2013
 December 2012
 November 2012
 October 2012
 September 2012
 July 2012
 June 2012
 May 2012
 April 2012
 March 2012
 February 2012
 January 2012
 September 2011
 August 2011
 April 2011
 March 2011
 February 2011
 January 2011
Categories
Meta
Monthly Archives: October 2014
Notes of Alessio Figalli’s lecture
Quantitative stability estimates for the BrunnMinkowski inequality 1. The stability problem 1.1. BrunnMinkowski’s inequality Let . Note that , so When does equality hold ? When . This is an easy particular case of the following. Theorem 1 (BrunnMinkowski) Let … Continue reading
Pansu’s Lille slides
Slides of Pansu’s 2 lectures on Lp cohomology and large scale conformal maps. lille_15oct14_beamer
Posted in Uncategorized
Leave a comment
Notes of Romain Tessera’s Lille lecture nr 2
1. Consequence Corollary 1 Let be a real Lie group. Then is hyperbolic iff it acts isometrically and transitively on a negatively curved Riemannian manifold. Let be a adic Lie group. Then is hyperbolic iff it acts isometrically and transitively … Continue reading
Notes of François Le Maître’s lecture
Full groups in the locally compact measure preserving setting 1. Orbit equivalence Let be a locally compact secound countable group, a standard probability measure space, on which acts preserving . Let denote the corresponding equivalence relation. 1.1. A general lemma … Continue reading
Notes of Henrik Petersen’s lecture
Quasiisometries of nilpotent groups Joint work (in progress) with David Kyed. The paper is not fully written, so be careful. 1. Nilpotent groups Let be finitely generated torsion free nilpotent. Mal’cev’s theorem states that there exists a unique connected Lie … Continue reading
Notes of Damien Gaboriau’s Lille lecture nr 3
Lück’s approximation theorem For residually finite groups, Betti numbers can be obtained as limits of ordinary Betti numbers. Theorem 1 (Lück) Let be decreasing finte index normal subgroups of . Assume that Assume that acts freely cocompactly on some simplicial … Continue reading
Notes of Gaboriau’s Lille lecture nr 2
1. Formulae Free products of infinite groups: add up for , add up plus one. Free products with amalgamation: idem ( add up…) provided amalgamated subgroup is amenable. 2. Betti numbers of amenable groups Following Cheeger and Gromov, I show … Continue reading