Person: Seidel, Jaap
Jaap Seidel was a Dutch mathematician who who worked in geometry and graph theory.
Mathematical Profile (Excerpt):
- At an early age already, Jaap had experience in what is now called Networking.
- When it became clear that the closure was not going to be a short one, Seidel, who had continued his studies there up to that point, now transferred to the Free University of Amsterdam where he was strongly influenced by Johannes Haantjes.
- Soon Seidel found an opportunity to escape from the Germans and was able to return to the Netherlands where he remained in hiding for the rest of the war.
- From March to July 1946, Seidel taught engineering at a secondary training school in Amsterdam, then from September 1946 to September 1950 he taught at the prestigious Vossius Gymnasium in Amsterdam.
- Haantjes had moved from Amsterdam to Leiden, so it was natural for Seidel to submit his doctoral studied there.
- Haantjes and Seidel announced the results in the paper The congruence order of the elliptic plane (1947).
- Seidel published full proof in his 71 page thesis published in 1948.
- Seidel had been put in charge of the Entertainment Committee for the International Congresses of Mathematicians held in Amsterdam in September 1954.
- In the spring of 1955 Seidel was given leave to study with Van der Ven in Rome, an unusual privilege for someone in his position.
- Johannes Haantjes became ill in 1955 (he died in the following year) and Seidel was asked to give some of his courses at Leiden.
- All these conferences published proceedings and Seidel's contribution was published in each.
- We end this biography with two tributes to Seidel.
- Many mathematicians, especially young ones, were influenced by Jaap.
- Jaap's work makes connections with several branches in mathematics, and he had struck friendships with mathematicians all over the world.
Born 19 August 1919, The Hague, The Netherlands. Died 8 May 2001, Eindhoven, The Netherlands.
View full biography at MacTutor
Tags relevant for this person:
Origin Netherlands
Thank you to the contributors under CC BY-SA 4.0! 
- Github:
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- non-Github:
- @J-J-O'Connor
- @E-F-Robertson
References
Adapted from other CC BY-SA 4.0 Sources:
- O’Connor, John J; Robertson, Edmund F: MacTutor History of Mathematics Archive
