Lepowsky graduated from Stuyvesant High School in 1961 , 16 years after Kostant .
He received his Ph. D from M.I.T. in 1970 where his advisors were Bertram Kostant and Sigurdur Helgason .
Lepowsky graduated from Stuyvesant High School in 1961 , 16 years after Bertram Kostant .
He received his Ph. D from M.I.T. in 1970 where his advisors were Bertram Kostant and Sigurdur Helgason .