Meet the 'Lady Gaga of Mathematics' helming France's AI task force

On a crisp Saturday morning in Orsay, a southwestern suburb of Paris with some 16,500 inhabitants, the rue de Paris was bustling. But while many residents were doing their usual weekend shopping at the fishmonger or the butcher shop, further up the street, in a small former chateau that is now the town's cultural center, about 80 people had set aside their late-morning hours to hear the "voeux" of their legislative representative to the National Assembly, Cédric Villani. The voeux, or "new year's wishes," are a standard exercise of French politicians from the president on down, in which they review activities of the past year and lay out projects for the year to come. Villani, a mathematician and Fields Medal winner (often shorthanded as the equivalent of the Nobel Prize in mathematics), was new to the practice; only six months earlier, he was still an academic. He was dressed as always -- winter or summer -- in a black three-piece suit, a shirt with cufflinks, a spider brooch on his lapel, and a large, floppy tie called a lavallière (today's version in purple).