Dear Pascal,
This volume is presented to you by your friends, colleagues past and present, and former students, on the occasion of your sixtieth birthday. It is the expression of our admiration for your curiosity, your knowledge and your talent, but also our appreciation for your humour and our gratitude for your intellectual generosity.
Tu es une galette qu'aucun renard ne croquera.
Julien, Davide and Anne.