The PM4 talks will be on 24 September, starting 2pm, in Carslaw room 830. 14:00-14:30 -- Matthias Wong: Random walks on tree 14:40-15:10 -- Clinton Boys: Symmetric functions, harmonic polynomials and Garsia-Haiman modules 15:20-15:50 -- Jack Lee: Hasse’s Theorem and Point Counting on Elliptic Curves 16:00-16:30 -- Joshua Ching: Sobolev spaces with applications to elliptic PDEs