Some fun pictures coming from universal Neron model admitting stacks - feel free to ask for more details...
Sage worksheet for automatically generating questions for linear algebra exams (eg. `random' matrices in GL_n(Z) with small entries).
A page </> with some information relating to recent talk at Skinner's school.
Notes from talks by Angelo Vistoli at the summer school on Stacks , Mainz, 2015.
Notes from a course I taught on elliptic curves in Leiden. Many thanks to Steve Alberts for typesetting.
Page on pronouns for students writing theses.
2019 Intercity geometry seminar on a preprint of Molcho and Wise in which they prove the representability (in a suitable sense) of the logarithmic Picard functor. I am organising this jointly with Chris Lazda , Adrien Sauvaget and Arne Smeets . See here for more information.