Keywords: PvanGeer.jpg en Pieter van Geer 1841-1919 professor mathematics at Leiden University Portrait 1903 by Hendrik Johannes Haverman 1857-1928 1903 Icones Leidenses 288 Digitool http //socrates leidenuniv nl Hendrik Johannes Haverman 1857-1928 PD-old-100 Uploaded with UploadWizard Rectores magnifici from Leiden University Leiden University faculty Professors from the Netherlands Mathematicians from the Netherlands 1841 births 1919 deaths Icones Leidenses Hendrik Johannes Haverman Photographs uploaded by User Vysotsky |