Emil Grosswald
Emil Grosswald ( December 15 , 1912 – April 11 , 1989 ) was a mathematician who worked primarily in number theory . 
<triplet> Emil Grosswald <subj> December 15, 1912 <obj> date of birth <subj> April 11, 1989 <obj> date of death <subj> mathematician <obj> occupation <subj> number theory <obj> field of work