Richard Courant

Richard Courant

Infobox Scientist
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name = Richard Courant


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birth_date = January 8, 1888
birth_place = Lublinitz, Kingdom of Prussia
death_date = January 27 1972
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fields = Mathematician
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doctoral_students = William Feller
Martin Kruskal
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Richard Courant (born January 8, 1888 – January 27, 1972) was a German American mathematician.

Life

Courant was born in Lublinitz in the German Empire's Prussian Province of Silesia. During his youth, his parents had to move quite often, to Glatz, Breslau, and in 1905 to Berlin. He stayed in Breslau and entered the university there. As he found the courses not demanding enough, he continued his studies in Zürich and Göttingen. Courant eventually became David Hilbert's assistant in Göttingen and obtained his doctorate there in 1910. He had to fight in World War I, but he was wounded and dismissed from the military service shortly after enlisting. After the war, in 1919, he married Nerina (Nina) Runge, a daughter of the Göttingen professor for Applied Mathematics, Carl Runge. He continued his research in Göttingen, with a two-year period as professor in Münster. There he founded the Mathematical Institute, which he headed as director from 1928 until 1933.

Courant left Germany in 1933, earlier than many of his colleagues. While he was classified as a Jew by the Nazis, his having served as a front-line soldier exempted him from losing his position for this particular reason at the time; however, his public membership in the social-democratic left was a reason for dismissal to which no such exemption applied. [http://www-irma.u-strasbg.fr/~schappa/GoeNS.pdf]

After one year in Cambridge, Courant went to New York City where he became a professor at New York University in 1936. He was given the task of founding an institute for graduate studies in mathematics, a task which he carried out very successfully. The Courant Institute of Mathematical Sciences (as it was renamed in 1964) continues to be one of the most respected research centers in applied mathematics.

Apart from his outstanding organizational talent, Courant is well remembered for his mathematical achievements. He authored the influential textbook "Methods of Mathematical Physics", which is still widely used more than eighty years after it was written. He was the co-author, with Herbert Robbins, of a popularization titled "What is Mathematics?", which is still in print. His name is also attached to the finite element method, later reinvented by engineers. Courant gave this a solid mathematical basis. This method is now one of the ways to solve partial differential equations numerically. Courant is a namesake of the Courant–Friedrichs–Lewy condition and the Courant minimax principle.

Courant died in New York City. The particle physicist Ernest Courant is his son.

Perspective on mathematics

Commenting upon his analysis of experimental results from in-laboratory soap film formations, Courant believed that the existence of a physical solution does not obviate the need for mathematical proof. Here is a quote from Courant on his mathematical perspective:

Empirical evidence can never establish mathematical existence--nor can the mathematician's demand for existence be dismissed by the physicist as useless rigor. Only a mathematical existence proof can ensure that the mathematical description of a physical phenomenon is meaningful. [ The Parsimonious Universe, Stefan Hildebrandt & Anthony Tromba, Springer-Verlag, 1996, page 148 ]

Notes

External links

*MathGenealogy |id=7378
*MacTutor Biography|id=Courant
* [http://newton.nap.edu/html/biomems/rcourant.html Biographical memoir] – by Peter Lax
* [http://www.aip.org/history/ohilist/4562.html Oral History interview transcript with Richard Courant 9 May 1962, American Institute of Physics, Niels Bohr Library and Archives]


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