Poul Heegaard was a Danish mathematician who, with Max Dehn, was the first to classify compact surfaces. He was born in Copenhagen on 2 November 1871 and died in Oslo on 7 February 1948. Two-dimensional manifolds were considered by Riemann as Riemann surfaces and rigorously classified at the beginning of the twentieth century by Heegaard and Dehn. He was the second of two children, and his father Sophus, who had an interest in astronomy and mathematics, strongly influenced him as a boy.
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Source Poul Heegaard, Biography (MacTutor History of Mathematics)
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Source Poul Heegaard, Biography (MacTutor History of Mathematics)SummaryQuote, Summary
Poul Heegaard was a Danish mathematician who ( with Max Dehn ) was the first to classify compact surfaces.
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1. Poul Heegaard, Biography (MacTutor History of Mathematics)
SummaryQuote, Summary
Poul Heegaard was a Danish mathematician who ( with Max Dehn ) was the first to classify compact surfaces.
Manifold (Wikipedia)
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Two-dimensional manifolds, also known as a 2D surfaces embedded in our common 3D space, were considered by Riemann under the guise of Riemann surfaces, and rigorously classified in the beginning of the 20th century by Poul Heegaard and Max Dehn
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