🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaالعربيةEntityQ6217093· pop 5· linked from 17 articlesJohannes de GrootDutch mathematician (1914-1972)ConnectionsRotterdamEntityLoppersumEntityCategories1914 births1972 deaths20th-century Dutch mathematiciansAcademic staff of the Delft University of TechnologyMembers of the Royal Netherlands Academy of Arts and SciencesPeople from LoppersumTopologistsUniversity of Groningen alumniWashington University in St. Louis mathematicians