लेखक: François Laudenbach

Albert Fathi is professor at the École Normale Supérieure de Lyon. François Laudenbach is professor emeritus at the University of Nantes. Valentin Poénaru is professor emeritus at the Université Paris-Sud, Orsay. Djun Kim is a Skylight research associate in mathematics at the University of British Columbia. Dan Margalit is assistant professor of mathematics at Georgia Institute of Technology. He is the coauthor of A Primer on Mapping Class Groups (Princeton).