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・ Poul Erik Andreasen
・ Poul Erik Bech
・ Poul Erik Petersen
・ Poul Erik Tøjner
・ Poul F. Joensen
・ Poul Glargaard
・ Poul Gnatt
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・ Poul H. Poulsen
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・ Poul Hansen (football manager)
・ Poul Hansen (sport wrestler)
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Poul Heegaard
・ Poul Helgesen
・ Poul Henningsen
・ Poul Holm
・ Poul Hultberg
・ Poul Hübertz
・ Poul Ib Gjessing
・ Poul Jensen
・ Poul Jensen (astronomer)
・ Poul Jensen (footballer born 1899)
・ Poul Jensen (footballer born 1934)
・ Poul Jørgensen
・ Poul Jørgensen (chemist)
・ Poul Jørgensen (conductor)
・ Poul Jørgensen (gymnast)


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Poul Heegaard : ウィキペディア英語版
Poul Heegaard

Poul Heegaard (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.
Heegaard studied mathematics at the University of Copenhagen, from 1889 to 1893 and following years of travelling, and teaching mathematics, he was appointed professor at University of Copenhagen in 1910.
Following a dispute with the faculty over, among other things, the hiring of Harald Bohr as professor at the University (Heegaard was against it); Heegaard accepted a professorship at Oslo in Norway, where he worked till his retirement in 1941.
==Notes==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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