John Landen was an English mathematician, born at Peakirk near Peterborough in January 1719 and dead at Milton on 15 January 1790. Brought up as a surveyor, he acted as land agent to Earl Fitzwilliam from 1762 to 1788 and cultivated mathematics in his leisure, contributing to the Ladies' Diary from 1744, publishing Mathematical Lucubrations in 1755 and sending the Royal Society investigations on the fluxionary calculus from 1754. He tried to replace fluxions by a purely algebraic method in his Residual Analysis, later pursued by Lagrange, and gave Landen's transformation, expressing a hyperbolic arc in terms of two elliptic arcs, in 1775. He also solved the problem of a spinning top. He was elected to the Royal Society in 1766.
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John Landen (23 January 1719 – 15 January 1790) was an English mathematician.
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John Landen (23 January 1719-15 January 1790) was an English mathematician.
Biography, birth
John Landen (23 January 1719-15 January 1790) was an English mathematician.
Biography, gender
He was born at Peakirk, near Peterborough in Northamptonshire, on 28 January 1719.
In Branch: Calculus, Lead, field of work
and from 1754 onwards communicated to the Royal Society valuable investigations on points connected with the fluxionary
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