Poul Heegaard
Template:Short description Script error: No such module "Template wrapper".Script error: No such module "Check for conflicting parameters". Poul Heegaard (Script error: No such module "IPA".; November 2, 1871, Copenhagen - February 7, 1948, Oslo) was a Danish mathematician active in the field of topology. His 1898 thesis introduced a concept now called the Heegaard splitting of a 3-manifold. Heegaard's ideas allowed him to make a careful critique of work of Henri Poincaré. Poincaré had overlooked the possibility of the appearance of torsion in the homology groups of a space.
He later co-authored, with Max Dehn, a foundational article on combinatorial topology, in the form of an encyclopedia entry.[1]
Heegaard studied mathematics at the University of Copenhagen from 1889 to 1893. Following years of travelling, and teaching mathematics, he was appointed professor at University of Copenhagen in 1910. An English translation of his 1898 thesis, which laid a rigorous topological foundation for modern knot theory, may be found at https://www.maths.ed.ac.uk/~v1ranick/papers/heegaardenglish.pdf. The section on "a visually transparent representation of the complex points of an algebraic surface" is especially important.
In 1936, Heegaard served as the President of The Third International Congress of Nationalists at The Nobel Institute. Following a talk titled "A Biologist's View of the Future of the White Race," Heegaard hosted a garden party for the Congress participants.[2]
Following a dispute with the faculty over, among other things, the hiring of Harald Bohr as professor at the University (which Heegaard opposed);[3] Heegaard accepted a professorship at Oslo in Norway, where he worked till his retirement in 1941.
Notes
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- ^ Page Module:Citation/CS1/styles.css has no content.Dehn, Max; Heegaard, Poul (1907). "Analysis situs". Enzyklop. d. math. Wissensch. Vol. III. pp. 153–220. JFM 38.0510.14.
- ^ Page Module:Citation/CS1/styles.css has no content."Programme of the Congress". National Archives. The Norwegian Committee of the Nationalist Academy for International Justice. 1936.
- ^ Page Module:Citation/CS1/styles.css has no content.Munkholm, Ellen S.; Munkholm, Hans J. (1999), "Poul Heegaard", History of topology, North-Holland, Amsterdam, pp. 925–946, doi:10.1016/B978-044482375-5/50035-3, ISBN 978-0-444-82375-5, MR 1721129; see in particular pp. 937–938.
External links
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- Works by or about Poul Heegaard at the Internet Archive
- Page Module:Citation/CS1/styles.css has no content.Heegaard, Poul (1898), Forstudier til en topologisk Teori for de algebraiske Fladers Sammenhang (PDF), Thesis (in Danish), JFM 29.0417.02
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- "Heegaard home page"
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