In the video Professor James Arthur explains the historical figures on the poster of the Fields Medal Symposium. He talks about a graphical representation of the Fundamental Lemma. He also describes the work of each of mathematician on the poster. (from left to right) Hermann Weyl, Erich Hecke, Emil Artin, Atle Selberg, Harish-Chandra, Alexander Grothendieck, and Robert Langlands.
Check back for more posts about the Langlands program, the Symposium, and some musings about mathematics.