* Grothendieck Circle, collection of mathematical and biographical information, photos, links to his writings* Institut des Hautes Études Scientifiques* The origins of `Pursuing Stacks' This is an account of how `Pursuing Stacks' was written in response to a correspondence in English with Ronnie Brown and Tim Porter at Bangor, which continued until 1991.
== External links ==* Grothendieck Circle, collection of mathematical and biographical information, photos, links to his writings* Institut des Hautes Études Scientifiques* The origins of `Pursuing Stacks' This is an account of how `Pursuing Stacks' was written in response to a correspondence in English with Ronnie Brown and Tim Porter at Bangor, which continued until 1991.