EntityQ7964986· pop 5· linked from 14 articlesWalter GottschalkSign in to saveAmerican mathematicianConnectionsInternational Standard Book NumberEntityProvidenceEntityWayback MachineEntitydigital object identifierEntitynumerical analysisEntityUniversity of PennsylvaniaEntityJSTOROrganizationUniversity of VirginiaEntityLynchburgEntityMathematics Genealogy ProjectEntitySalemEntityWesleyan UniversityEntityInstitute for Advanced StudyEntitySpringer Science+Business MediaEntityPaul HalmosEntitygraph coloringEntityAmerican Association for the Advancement of ScienceEntityMathematical ReviewsEntityProceedings of the American Mathematical SocietyEntityDe Bruijn–Erdős theoremEntityCategories1918 births2004 deaths20th-century American mathematiciansAmerican people of German descentFellows of the American Association for the Advancement of ScienceUniversity of Pennsylvania facultyUniversity of Virginia alumniWesleyan University faculty