Viscount William Brouncker

Viscount William Brouncker

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Credit: SCIENCE PHOTO LIBRARY

Caption: Viscount Brouncker. Portrait of Viscount William Brouncker, Irish mathematician and 2nd Viscount Brouncker of Castle Lyons (1620-84). He was a founding member of the Royal Society and its first President, and as a friend of Samuel Pepys was mentioned in his Diary. Brouncker expressed 'pi' as a continued fraction. With John Wallis, he solved Fermat's questions about Pell's equation, giving a general method for their solution.

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Keywords: 17th century, black-and-white, brouncker, fermat's questions, first president, infinite series, irish, john, mathematical solution, mathematician, mathematics, maths, monochrome, pell's equation, pi, portraits, royal society, samuel pepys friend, surname b, viscount william, wallis

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