Louis Napoleon George Filon

Louis Napoleon George Filon, FRS (22 November 1875 – 29 December 1937) was a French-born English applied mathematician, famous for his research on classical mechanics and particularly the theory of elasticity and the mechanics of continuous media. He also developed a method for the numerical quadrature of oscillatory integrals, now known as Filon quadrature. He was Vice Chancellor of the University of London from 1933–35.

He was born at Saint-Cloud, near Paris, as the only child of Augustin Filon, the French littérateur who was appointed as the official tutor to the Prince Imperial. Accompanying the Prince Imperial in his exile, the Filon family came to England in 1878 and lived at Margate. He was educated at Herne House School in Margate.

In 1894 Filon became a student at University College, London and received his BA in 1896 with a gold medal in Greek. He was appointed in the college as Demonstrator in Applied Mathematics under the supervision of Karl Pearson. He spotted a mistake in Pearson's lectures and the correction was incorporated into a joint publication with Pearson. This important paper was Filon's only publication in statistics.

In 1898 Filon went to King's College, Cambridge on an 1851 Exhibition Research Fellowship for advanced study. In July 1902 he earned a doctorate in mixed mathematics from University College, London, and in 1903 he became there a lecturer in pure mathematics under M J M Hill. In 1910 Filon was elected a Fellow of the Royal Society. In 1912, upon Pearson's retirement, Filon was appointed to the Goldsmid Chair of Applied Mathematics and Mechanics at University College, London. Except for an academic leave during his military service in the First World War, he occupied this chair until his death in 1937. Filon was also Director of the University of London Observatory from 1929 to 1937. He was the author of over 50 papers and three books (one as co-author with ).

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