Charles Pisot (2 March 1910 – 7 March 1984) was a
French mathematician
A mathematician is someone who uses an extensive knowledge of mathematics in their work, typically to solve mathematical problems.
Mathematicians are concerned with numbers, data, quantity, structure, space, models, and change.
History
On ...
. He is chiefly recognized as one of the primary investigators of the numerical set associated with his name, the
Pisot–Vijayaraghavan number
In mathematics, a Pisot–Vijayaraghavan number, also called simply a Pisot number or a PV number, is a real algebraic integer greater than 1, all of whose Galois conjugates are less than 1 in absolute value. These numbers were discovered by Axel ...
s.
He followed the classical path of great French mathematicians by studying at the
École Normale Supérieure
École may refer to:
* an elementary school in the French educational stages normally followed by secondary education establishments (collège and lycée)
* École (river), a tributary of the Seine flowing in région Île-de-France
* École, Savoi ...
on Ulm street, where he was received first at the agrégation in 1932. He then began his academic career at the
Bordeaux University
The University of Bordeaux (French: ''Université de Bordeaux'') is a public university based in Nouvelle-Aquitaine in southwestern France.
It has several campuses in the cities and towns of Bordeaux, Dax, Gradignan, Périgueux, Pessac, and Ta ...
before being offered a chair at the Science Faculty of Paris and at the
École Polytechnique
École may refer to:
* an elementary school in the French educational stages normally followed by secondary education establishments (collège and lycée)
* École (river), a tributary of the Seine flowing in région Île-de-France
* École, Savoi ...
. He was a member of
Bourbaki.
Also of interest is the recently solved Pisot conjecture on
rational function
In mathematics, a rational function is any function that can be defined by a rational fraction, which is an algebraic fraction such that both the numerator and the denominator are polynomials. The coefficients of the polynomials need not be rat ...
s. (For a technical account and bibliography see
Umberto Zannier
Umberto Zannier (born 25 May 1957, in Spilimbergo, Italy) is an Italian mathematician, specializing in number theory and Diophantine geometry.
Education
Zannier earned a Laurea degree from University of Pisa and studied at the Scuola Normale Sup ...
's paper in the ''
Annals of Mathematics
The ''Annals of Mathematics'' is a mathematical journal published every two months by Princeton University and the Institute for Advanced Study.
History
The journal was established as ''The Analyst'' in 1874 and with Joel E. Hendricks as the ...
''.)
He was also the coauthor (with Marc Zamansky) of a textbook in general mathematics (titled ''Mathématiques générales'') which was very popular in the 1960s and 1970s.
References
External links
Biography(in French)
*
1910 births
1984 deaths
People from Obernai
École Polytechnique faculty
20th-century French mathematicians
École Normale Supérieure alumni
University of Paris faculty
Nicolas Bourbaki
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