1 A short trop to Cumuland, an hommage to the memory of Ivan Todorov(.pdf), Sofia, May 2026,

2 Philippe @ Saclay (and elsewhere), the early years (.pdf), IPhT Saclay, June 2024,

3 Counting partitions by genus (.pdf), IHES, November 2023,

4 35 years @ SPhT, a few reminiscences (.pdf), Saclay, November 2023, on the occasion of the 60th birthday of SPhT

5 Some aspects of Horn's problem (.pdf), Mathematical Colloquium, Toulouse, June 2023

6 Mathematical Harmony and the Quantum World (.pdf), a few words on the occasion of the 60th birthday of Denis Bernard, ENS 2021

6 A Portrait of the Artist as a Young Man (.pdf), on the occasion of the 60th birthday of Hubert Saleur, IPhT Saclay 2021

8 2D-CFT's. The blossoming of the 80's(.pdf), talk given at Saclay, Dec. 2018

9 ADE and all that(.pdf), talk given at Harvard, Oct. 2018

10 Counting Doodles, an hommage to Claude Itzykson(.pdf), talk given at the 20th Itzykson Conference, Saclay, June 10th, 2015

11 Invariances in Physics and Group Theory(.pdf), talk given at the conference "Lie and Klein; the Erlangen program and its impact on mathematics and physics", Strasbourg, Sept. 2012

12 Introduction to random matrices (.pdf) Berkeley 2007

13 Vingt Ans Apres (.pdf), an hommage to John Cardy, on the occasion of his 60th birthday, Oxford 2007