Complex sentence: Dominique de Caen (--) was a mathematician, Doctor of Mathematics, and professor of Mathematics, who specialized in graph theory, probability, and information theory, and was renowned mostly for his research on Turán's extremal problem for hypergraphs.
Split into simpler sentences: Dominique de Caen (--) was a mathematician, Doctor of Mathematics, and professor of Mathematics, who specialized in graph theory, probability, and information theory. He was renowned mostly for his research on Turán's extremal problem for hypergraphs.