A solution to Arf-Kervaire invariant problem

Introduction to Global Analysis by Sergiu Moroianu (Universität Hamburg), February 13-18,2002.
Introduction to Topological Stacks by Behrang Noohi (Max Planck Institute, Bonn), June 26-29,2006.
Introduction to Differential Graded Categories by Gonçalo Tabuada (Université Denis Diderot - Paris VII), September 25-27,2006.
A Solution to the Arf-Kervaire invariant problem by Doug Ravenel (University of Rochester), May 5-7, 2009.
Xth Lisbon Summer Lectures in Geometry by Dietmar Salamon (ETH) and Kai Behrend (UBC), June 29-July 2, 2009.
Existence of rational points on smooth projective varieties by Bjorn Poonen (MIT), July 12, 2010. The link leads to a video of this special Algebra seminar.
XII Lisbon Summer Lectures in Geometry by Mark Behrens (MIT) and Nitu Kitchloo (Johns Hopkins and UCSD), June 27-30, 2011.
Topology of Manifolds, Lisbon a conference in honor of Michael Weiss' 60th birthday. Lisbon, June 27th to July 1st, 2016.
Summer schools for undergraduates sponsored by the Gulbenkian Foundation (2012-2019)
Novos Talentos em Matemática Member of the steering committee of this undergraduate research program sponsored by the Gulbenkian Foundation (2011-2021)