# Mathematician:John Pell

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## Mathematician

English mathematician, astronomer and foreign diplomat most famous for what is now known as Pell's Equation.

## Nationality

English

## History

- Born: 1 March 1611, Southwick, Sussex, England
- Educated at Steyning Grammar School
- 1624: Entered Trinity College, Cambridge
- 1628: Received B.A.
- 1630: Received M.A.
- 1630: Started teaching at Collyer's School, Horsham, and then Chichester Academy
- 3rd July 1632: Married Ithumaria Reginolles, sister of Bathsua Reginolles Makin
- 1638: Started teaching in London
- 1643: Professor of Mathematics at the Gymnasium Illustre in Amsterdam
- 1646: Professor of Mathematics at the University of Breda
- 1652: Returned to England, appointed by Oliver Cromwell to a post teaching mathematics in London.
- 1654 - 1658: Government post in Zurich
- 1658: Returned to England, tried but failed to make contact with Cromwell, who shortly after died
- 1661: Ordained a deacon, then a priest, became vicar at Fobbing in Essex
- 20 May 1663: Elected to the Royal Society
- 1663: Became vicar of Laindon and Basildon in Essex
- Summer 1665: Left plague-ridden London to live with William Brereton at Brereton Hall in Cheshire
- 1675: Elected vice-president of Royal Society
- 3rd March 1680: Death of William Brereton
- 1680: Returned to London, spent some time in a debtor's prison
- Died: 12 Dec 1685, Westminster, London, England

## Theorems and Definitions

- Pell's Equation (popularly believed to have been misattributed by Euler -- this is disputed)
- Pell Numbers
- Pell-Lucas Numbers (with Édouard Lucas)

Results named for **John Pell** can be found here.

Definitions of concepts named for **John Pell** can be found here.

## Publications

- 1634:
*Astronomical History of Observations of Heavenly Motions and Appearances* - 1634:
*Ecliptica prognostica* - 1638:
*An Idea of Mathematicks* - 1644:
*Controversy with Longomontanus concerning the Quadrature of the Circle* - 1672:
*A Table of Ten Thousand Square Numbers*

## Sources

- 1989: Ephraim J. Borowski and Jonathan M. Borwein:
*Dictionary of Mathematics*... (previous) ... (next):**Pell's equation** - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next):**Pell, John**(1610-85)