Daniel Gorenstein

Daniel E. Gorenstein was an American mathematician best remembered for his contribution to the classification of finite simple groups.
Gorenstein mastered calculus at age 12 and subsequently matriculated at Harvard University, where he earned his bachelor's and master's degrees. During the Second World War, he taught mathematics to military personnel. After the war, he stayed at Harvard and earned his PhD 1950 under the supervision of Oscar Zariski. In his dissertation, Gorenstein introduced a duality principle for plane curves that motivated Alexander Grothendieck's introduction of Gorenstein rings. Gorenstein held posts at Clark University and Northeastern University, before moving to Rutgers University in 1969, where he remained for the rest of his life. He became the founding director of the Center for Discrete Mathematics and Theoretical Computer Science at Rutgers in 1989, and remained at this post until his death.
He was recognized, in addition to his own research contributions such as work on signalizer functors, as a leader in directing the classification of finite simple groups, one of the largest collaborative pieces of pure mathematics ever attempted.