David Gregory (mathematician)
David Gregory  

Born 
1661 Aberdeen, Scotland 
Died 
10 October 1708 Maidenhead, Berkshire, England 
(aged 49)
Residence  Scotland, Netherlands, France, England 
Nationality  Scottish 
Alma mater 
Marischal College, Aberdeen University of Leiden 
Known for  Development of infinite series 
Scientific career  
Fields  Mathematics 
Institutions 
University of Edinburgh Balliol College, Oxford 
Notable students 
John Keill John Craig 
Influences 
James Gregory Archibald Pitcairne Isaac Newton 
Influenced 
Colin Maclaurin William Whiston 
Notes  
He is the nephew of James Gregory.

David Gregory (originally spelt Gregorie) FRS (1661 – 10 October 1708) was a Scottish mathematician and astronomer. He was professor of mathematics at the University of Edinburgh, and later Savilian Professor of Astronomy at the University of Oxford, and a proponent of Isaac Newton's Principia.
Contents
Biography
The fourth of the fifteen children of David Gregorie, a doctor from Kinnairdy, Banffshire, and Jean Walker of Orchiston, David was born in Upper Kirkgate, Aberdeen. The nephew of astronomer and mathematician James Gregory, David, like his influential uncle before him, studied at Aberdeen Grammar School and Marischal College (University of Aberdeen), from 1671 to 1675. The Gregorys were Jacobites and left Scotland to escape religious discrimination. Young David visited several countries on the continent, including the Netherlands (where he began studying medicine at Leiden University) and France, and did not return to Scotland until 1683.
On 28 November 1683, Gregory graduated M.A. at University of Edinburgh, and in October 1683 he became Chair of Mathematics at University of Edinburgh. He was "the first to openly teach the doctrines of the Principia, in a public seminary...in those days this was a daring innovation."^{[1]}
Gregory decided to leave for England where, in 1691, he was elected Savilian Professor of Astronomy at the University of Oxford, due in large part to the influence of Isaac Newton. The same year he was elected to be a Fellow of the Royal Society. In 1692, he was elected a Fellow of Balliol College, Oxford.
Gregory spent several days with Isaac Newton in 1694, discussing revisions for a second edition of Newton's Principia. Gregory made notes of these discussions, but the second edition of 1713 was not due to Gregory.^{[2]}
In 1695 he published Catoptricae et dioptricae sphaericae elementa which addressed chromatic aberration and the possibility of its correction with achromatic lens.
In 1705 Gregory became an Honorary Fellow of the Royal College of Physicians of Edinburgh. At the Union of 1707, he was given the responsibility of reorganising the Scottish Mint. He was an uncle of philosopher Thomas Reid.
Gregory and his wife, Elizabeth Oliphant, had nine children, but seven died while still children.
On his death in Maidenhead, Berkshire he was buried in Maidenhead churchyard.
Works
 1684: Exercitatio geometria dimensione curvarum
 1695: Catoptricæ et dioptricæ sphæricæ elementa  digital facsimile from the Linda Hall Library
 1702: Astronomiae physicae et geometricae elementa
 1703: (editor) Euclides quae supersunt omnia (collected works of Euclid)
 1745: (Colin Maclaurin editor) Treatise of Practical Geometry via Internet Archive
References
 ^ David Gregory from Significant Scots at electricscotland.com
 ^ Westfall, Richard S. (1980). Never at Rest. Cambridge University Press. p. 506.
External links
Wikisource has the text of a 1911 Encyclopædia Britannica article about David Gregory. 
 O'Connor, John J.; Robertson, Edmund F., "David Gregory (mathematician)", MacTutor History of Mathematics archive, University of St Andrews.
 Lectures on Algebra ascribed to David Gregory, 18th century from Archives Hub by Jisc
 Papers of David Gregory (1661–1708) from Archives Hub
 1659 births
 1708 deaths
 People from Aberdeen
 Fellows of the Royal Society
 Scottish astronomers
 Scottish mathematicians
 Scottish scholars and academics
 Alumni of the University of Aberdeen
 Academics of the University of Edinburgh
 Fellows of Balliol College, Oxford
 Savilian Professors of Astronomy
 People educated at Aberdeen Grammar School
 Leiden University alumni
 Scottish Episcopalians
 17thcentury astronomers
 18thcentury astronomers