Jean Berstel
Jean Berstel (born 1941) is a French mathematician and theoretical computer scientist known for his contributions to combinatorics on words and formal language theory. He is a currently a professor emeritus at the University of Marne-la-Vallée. Biography. Berstel earned his doctorate (doctorat d'État) at the Paris Diderot University in 1973. In 1973–1995 he was a professor at Pierre and Marie Curie University, and in 1995–2005 a professor at the University of Marne-la-Vallée, where he is a professor emeritus since 2005. In 2006, Berstel was awarded an honorary doctorate from the University of Turku, Finland . A festschrift in his honour was published in 2003 as a special issue of Theoretical Computer Science. Research contributions. Berstel has been a member of the Lothaire group of mathematicians that developed the foundations of combinatorics of words. He has published several scientific monographs, including "Transductions and Context-free Languages" (1979), "Theory of Codes" (1985, jointly with Dominique Perrin), and "Codes and Automata" (2009; jointly with Dominique Perrin and Christophe Reutenauer) as well as the three Lothaire books.