Johannes Haantjes

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Johannes Haantjes (born September 18, 1909 in Itens , Friesland, † February 8, 1956 in Leiden ) was a Dutch mathematician who dealt with geometry . Most recently he was a professor at the University of Leiden .

life and work

Haantjes was the son of a school principal and attended high school in Leeuwarden and Valkenburg (South Holland) . He studied in Leiden with Jan Cornelis Kluyver , Jan Schouten (who taught differential geometry as a visiting professor ) and Johannes Droste and was assistant to Paul Ehrenfest for a short time . In 1933 he was treated with a suggested by Schouten work at Willem van der Woude PhD (The movable coordinate system in affine space , Dutch) and was his assistant in Delft. He publishes (partly with Schouten) on projective and conformal differential geometry, the latter with application to the Maxwell equations , Dirac equation and general relativity . With Schouten he also generalized the already well-known theorem that a three-dimensional quadric in four-dimensional projective space allows a conformal metric to any dimensions. From the 1940s he also dealt with metric geometry following Karl Menger , and here the Haantjes or Finsler-Haantjes curvature is named after him.

In 1934 he became a private lecturer in Leiden, during which time he also gave lectures in Edinburgh , and in 1938 he became a lecturer and in 1945 professor at the Free University of Amsterdam . In 1948 he became a professor in Leiden. In 1955, his health deteriorated and he died in February 1956.

He had been a member of the Dutch Academy of Sciences (KNAW) since 1952 .

He had been married to Marie Antoinette Mulder since 1939 and had four daughters.

Jaap Seidel was one of his doctoral students .

Fonts

  • Inleiding tot de differentiaalmeetkunde, Groningen, Noordhoff 1954

He was also to be writing the Introduction to Differential Geometry for the Oxford Tracts (Clarendon Press) at the time of his death.

literature

  • Willem van der Woude: Levens report J. Haantjes, Jaarboek KNAW, 1955/56, 218-223

Web links

Individual evidence

  1. ↑ Date and place of death see Open Archives
  2. ↑ means the accompanying tripod by Gaston Darboux
  3. ↑ Johannes Haantjes in the Mathematics Genealogy Project (English)Template: MathGenealogyProject / Maintenance / id used
  4. ↑ Haantjes, Schouten on general projective differential geometry , Compositio Mathematica, Volume 8, 1935, 1-51
  5. ↑ Haantjes, Schouten On the Conformal Invariant Shape of Maxwell's Equations , Physica 1934
  6. ^ Haantjes The conformal Dirac equation , Proc. KNAW, 44, 1941
  7. ↑ Haantjes, Schouten On the Conformal Invariant Shape of the Relativistic Equations of Motion , Proc. KNAW, 39, 1936
  8. ↑ Haantjes, Wrona On Conform Euclidean and Einsteinian Spaces of Even Dimension , Proc. KNAW, 42, 1939
  9. ↑ Haantjes, Schouten contributions to general (curved) conformal differential geometry , part 1,2, Mathematische Annalen, volume 112, 1936, 594–629, volume 113, 1937, 568–583, part 1 , part 2
personal data
SURNAME Haantjes, Johannes
BRIEF DESCRIPTION Dutch mathematician
DATE OF BIRTH September 18, 1909
PLACE OF BIRTH Itens
DATE OF DEATH February 8, 1956
Place of death Suffer