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- Gerrit_Lekkerkerker abstract "Cornelis Gerrit Lekkerkerker (Harmelen, 7 February 1922 – 24 July 1999) was a Dutch mathematician.Lekkerkerker studied mathematics at Utrecht University during the periods 1940-1943 and 1945-1949 under Jurjen Koksma and Jan Popken. In 1955 he received his doctorate under the guidance of Popken with the thesis On the Zeros of a Class of Dirichlet-Series; in Dutch: Over de nulpunten in een klasse van Dirichletreeksen.After completing his studies in 1949, he started work at the Amsterdam Centrum Wiskunde & Informatica (National Research Institute for Mathematics and Computer Science), where he worked under Koksma in the pure mathematics division. In the academic year 1953-1954, he studied in Rome.For 25 years, from 1961 to 1986, he was a professor at the University of Amsterdam, succeeding Nicolaas Govert de Bruijn. He was the director of the Mathematical Institute during the student protests of 1969-1973.He worked on analytic and geometric number theory. He and wrote the standard text, Geometry of Numbers, first published in 1969. Later, he worked on topics in functional analysis. In the 1970s, he turned his attention towards the mathematical treatment of topics in nuclear physics (e.g. neutron transport) and astrophysics (e.g. radiation transport within stars). Afterwards, he worked with Rutger Hangelbroek, who did his doctorate under Lekkerkerker in 1973 at the University of Groningen, and Hans Kaper of the Argonne National Laboratory. He also contributed to topics in graph theory and topology.In 1984, although he had not yet reached retirement age, he resigned his professorship over differences in the teaching of mathematical analysis, feeling that his academic freedom was under threat. He did, however, remain active in mathematics: for example, he brought out a second edition of Geometry of Numbers along with Peter Grüber. This field now found new applications in coding theory.He was a co-editor of Mededelingen van het Wiskundig Genootschap (correspondence of the Mathematical Society).".
- Gerrit_Lekkerkerker thumbnail Lekkerkerker.jpg?width=300.
- Gerrit_Lekkerkerker wikiPageExternalLink naw5-2000-01-3-228.pdf.
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- Gerrit_Lekkerkerker wikiPageRevisionID "697376788".
- Gerrit_Lekkerkerker wikiPageWikiLink Academic_freedom.
- Gerrit_Lekkerkerker wikiPageWikiLink Analytic_number_theory.
- Gerrit_Lekkerkerker wikiPageWikiLink Argonne_National_Laboratory.
- Gerrit_Lekkerkerker wikiPageWikiLink Astrophysics.
- Gerrit_Lekkerkerker wikiPageWikiLink Category:1922_births.
- Gerrit_Lekkerkerker wikiPageWikiLink Category:1999_deaths.
- Gerrit_Lekkerkerker wikiPageWikiLink Category:20th-century_Dutch_mathematicians.
- Gerrit_Lekkerkerker wikiPageWikiLink Category:University_of_Amsterdam_faculty.
- Gerrit_Lekkerkerker wikiPageWikiLink Centrum_Wiskunde_&_Informatica.
- Gerrit_Lekkerkerker wikiPageWikiLink Coding_theory.
- Gerrit_Lekkerkerker wikiPageWikiLink Dirichlet_series.
- Gerrit_Lekkerkerker wikiPageWikiLink Dutch_language.
- Gerrit_Lekkerkerker wikiPageWikiLink Functional_analysis.
- Gerrit_Lekkerkerker wikiPageWikiLink Geometry_of_numbers.
- Gerrit_Lekkerkerker wikiPageWikiLink Graph_theory.
- Gerrit_Lekkerkerker wikiPageWikiLink Harmelen.
- Gerrit_Lekkerkerker wikiPageWikiLink Jan_Popken.
- Gerrit_Lekkerkerker wikiPageWikiLink Jurjen_Ferdinand_Koksma.
- Gerrit_Lekkerkerker wikiPageWikiLink Mathematical_analysis.
- Gerrit_Lekkerkerker wikiPageWikiLink Neutron_transport.
- Gerrit_Lekkerkerker wikiPageWikiLink Nicolaas_Govert_de_Bruijn.
- Gerrit_Lekkerkerker wikiPageWikiLink Nuclear_physics.
- Gerrit_Lekkerkerker wikiPageWikiLink Pure_mathematics.
- Gerrit_Lekkerkerker wikiPageWikiLink Retirement_age.
- Gerrit_Lekkerkerker wikiPageWikiLink Russian_language.
- Gerrit_Lekkerkerker wikiPageWikiLink Topology.
- Gerrit_Lekkerkerker wikiPageWikiLink University_of_Amsterdam.
- Gerrit_Lekkerkerker wikiPageWikiLink University_of_Groningen.
- Gerrit_Lekkerkerker wikiPageWikiLink Utrecht_University.
- Gerrit_Lekkerkerker wikiPageWikiLink File:Lekkerkerker.jpg.
- Gerrit_Lekkerkerker wikiPageWikiLinkText "Gerrit Lekkerkerker".
- Gerrit_Lekkerkerker wikiPageUsesTemplate Template:Aut.
- Gerrit_Lekkerkerker wikiPageUsesTemplate Template:MathGenealogy.
- Gerrit_Lekkerkerker subject Category:1922_births.
- Gerrit_Lekkerkerker subject Category:1999_deaths.
- Gerrit_Lekkerkerker subject Category:20th-century_Dutch_mathematicians.
- Gerrit_Lekkerkerker subject Category:University_of_Amsterdam_faculty.
- Gerrit_Lekkerkerker hypernym Lekkerkerker.
- Gerrit_Lekkerkerker comment "Cornelis Gerrit Lekkerkerker (Harmelen, 7 February 1922 – 24 July 1999) was a Dutch mathematician.Lekkerkerker studied mathematics at Utrecht University during the periods 1940-1943 and 1945-1949 under Jurjen Koksma and Jan Popken.".
- Gerrit_Lekkerkerker label "Gerrit Lekkerkerker".
- Gerrit_Lekkerkerker sameAs Q15812052.
- Gerrit_Lekkerkerker sameAs Gerrit_Lekkerkerker.
- Gerrit_Lekkerkerker sameAs Gerrit_Lekkerkerker.
- Gerrit_Lekkerkerker sameAs Q15812052.
- Gerrit_Lekkerkerker wasDerivedFrom Gerrit_Lekkerkerker?oldid=697376788.
- Gerrit_Lekkerkerker depiction Lekkerkerker.jpg.
- Gerrit_Lekkerkerker isPrimaryTopicOf Gerrit_Lekkerkerker.