EntityQ451614· pop 10· linked from 42 articlesPeter J. FreydSign in to saveAmerican mathematicianConnectionsDoctor of PhilosophyEntityInternational Standard Book NumberEntitymathematicianEntitydigital object identifierEntityInternational Standard Serial NumberEntityPrinceton UniversityEntityUniversity of PennsylvaniaEntityBrown UniversityConceptEvanstonEntitycategory theoryEntityBachelor of ArtsEntityMathematics Genealogy ProjectEntityAmerican Mathematical SocietyEntitydoctoral advisorEntityadjoint functorEntityNorman SteenrodEntityBasic BooksEntityHOMFLY polynomialEntityMarta BungeEntityDavid BuchsbaumEntityCategories1936 births20th-century American mathematicians21st-century American mathematiciansCategory theoristsFellows of the American Mathematical SocietyLiving peopleMathematicians at the University of PennsylvaniaMathematicians from IllinoisPeople from Evanston, IllinoisPrinceton University alumniUniversity of Pennsylvania faculty