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'''René-François Walter de Sluse''' ('''Renatius Franciscus Slusius''', also '''Walther de Sluze'''), canon of [[Liège (city)|Liège]] and abbot of [[Amay]] (2 July 1622 – 19 March 1685) was a [[Walloons|Walloon]] [[mathematician]]. | |||
[[File:René François Walther de Sluze (Slusius).jpg|thumb|René François Walther de Sluze (Slusius).]] | |||
==Biography== | |||
He was born in Vise, Belgium and studied at the [[Old University of Leuven|University of Leuven]] (1638–1642) and received a master degree in law from the [[Sapienza University of Rome|University of Rome, La Sapienza]] in 1643. There he also studied several languages, [[mathematics]] and [[astronomy]]. Aside from mathematics he also produced works on astronomy, [[physics]], [[natural history]], general [[history]] and [[theology|theological]] subjects related to his work in the Church. | |||
He became a [[Canon (priest)|canon]] of the [[Catholic church]] in 1650, soon after which he became canon of Liège. In 1666 he took a new position as abbot of Amay. While in those positions, he maintained correspondence with [[Blaise Pascal]], [[Christiaan Huygens]], [[John Wallis]], and [[Michelangelo Ricci]]. He was appointed Chancellor of Liege and Counsellor and Chancellor to Prince Maximilian-Henry of Bavaria. | |||
He was elected a [[Fellow of the Royal Society]] in 1674.<ref>{{cite web | url = http://www2.royalsociety.org/DServe/dserve.exe?dsqIni=Dserve.ini&dsqApp=Archive&dsqCmd=Show.tcl&dsqDb=Persons&dsqPos=0&dsqSearch=%28Surname%3D%27slusius%27%29| title = Library and Archive catalogue|publisher = Royal Society|accessdate = 2012-03-01}}</ref> | |||
He died in Liège. | |||
==Mathematical contributions== | |||
He found for the [[subtangent]] of a [[curve]] | |||
:''f''(''x'', ''y'') = 0 | |||
an expression equivalent to | |||
:<math>{-y {\partial f \over \partial y} \over {\partial f \over \partial x}}.</math> | |||
He also wrote numerous tracts, and in particular discussed at some length [[spiral]]s and points of [[inflexion]]. The [[Conchoid of de Sluze]] is named after him. He is described by John Wallis in his Algebra as "a very accurate and ingenious person." Several of his works were included in the ''[[Transactions of the Royal Society]]'', e.g. his method of drawing tangents to geometrical curves. | |||
==References== | |||
{{reflist}} | |||
==External links== | |||
*[http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Sluze.html Biography at MacTutor history of math archive]. | |||
{{Rouse History of Mathematics}} | |||
{{use dmy dates|date=January 2011}} | |||
{{Persondata <!-- Metadata: see [[Wikipedia:Persondata]]. --> | |||
| NAME = Sluse, Rene-Francois de | |||
| ALTERNATIVE NAMES = | |||
| SHORT DESCRIPTION = mathematician | |||
| DATE OF BIRTH = 7 July 1622 | |||
| PLACE OF BIRTH = | |||
| DATE OF DEATH = 19 March 1685 | |||
| PLACE OF DEATH = | |||
}} | |||
{{DEFAULTSORT:Sluse, Rene-Francois de}} | |||
[[Category:1622 births]] | |||
[[Category:1685 deaths]] | |||
[[Category:Belgian scientists]] | |||
[[Category:Belgian mathematicians]] | |||
[[Category:17th-century mathematicians]] | |||
[[Category:Fellows of the Royal Society]] | |||
{{Belgium-scientist-stub}} | |||
{{europe-mathematician-stub}} | |||
Revision as of 18:07, 14 March 2013
René-François Walter de Sluse (Renatius Franciscus Slusius, also Walther de Sluze), canon of Liège and abbot of Amay (2 July 1622 – 19 March 1685) was a Walloon mathematician.
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Biography
He was born in Vise, Belgium and studied at the University of Leuven (1638–1642) and received a master degree in law from the University of Rome, La Sapienza in 1643. There he also studied several languages, mathematics and astronomy. Aside from mathematics he also produced works on astronomy, physics, natural history, general history and theological subjects related to his work in the Church.
He became a canon of the Catholic church in 1650, soon after which he became canon of Liège. In 1666 he took a new position as abbot of Amay. While in those positions, he maintained correspondence with Blaise Pascal, Christiaan Huygens, John Wallis, and Michelangelo Ricci. He was appointed Chancellor of Liege and Counsellor and Chancellor to Prince Maximilian-Henry of Bavaria.
He was elected a Fellow of the Royal Society in 1674.[1]
He died in Liège.
Mathematical contributions
He found for the subtangent of a curve
- f(x, y) = 0
an expression equivalent to
He also wrote numerous tracts, and in particular discussed at some length spirals and points of inflexion. The Conchoid of de Sluze is named after him. He is described by John Wallis in his Algebra as "a very accurate and ingenious person." Several of his works were included in the Transactions of the Royal Society, e.g. his method of drawing tangents to geometrical curves.
References
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External links
Template:Rouse History of Mathematics
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Template:Belgium-scientist-stub
Template:Europe-mathematician-stub