High Quality Content by WIKIPEDIA articles! Walther Franz Anton von Dyck (6 December 1856 in Munich – 5 November 1934 in Munich), born Dyck and later ennobled, was a German mathematician. He is credited with being the first to define a mathematical group, in the modern sense in (von Dyck 1882), and laid the foundations of combinatorial group theory, being the first to systematically study a group by generators and relations.