Oskar Perron
![Perron in 1948<br>Photo courtesy MFO](https://upload.wikimedia.org/wikipedia/commons/0/0b/Oskar_Perron.jpg)
He was a professor at the University of Heidelberg from 1914 to 1922 and at the University of Munich from 1922 to 1951. He made numerous contributions to differential equations and partial differential equations, including the Perron method to solve the Dirichlet problem for elliptic partial differential equations. He wrote an encyclopedic book on continued fractions ''Die Lehre von den Kettenbrüchen''. He introduced ''Perron's paradox'' to illustrate the danger of assuming that the solution of an optimization problem exists:
:''Let N be the largest positive integer. If N > 1, then N2 > N, contradicting the definition of N. Hence N = 1''. Provided by Wikipedia
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8Other Authors: “...Perron, Oskar, 1880-1975...”
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14by Perron, Oskar, 1880-1975
Published 1929
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18by Perron, Oskar, 1880-1975
Published 1971
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20by Perron, Oskar, 1880-1975
Published 1951
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