A Mathematician and an Artist. The Story of a Collaboration

In recent years it has become de rigueur for an invited speaker at a conference to “Thank the organizers for inviting me.” Today I can say this with more than the usual sincerity. Paris is my favorite city in the world, I have many fond memories of the Institut Henri Poincaré, and the subject of this conference is very close to my heart. So to Claude, and all the organizers who have worked hard to make this conference a success. Merci bien.