Michel Plancherel
Encyclopedia
Michel Plancherel was a Swiss
mathematician
. He was born in Bussy
(Fribourg
, Switzerland
) and obtained his diploma
in mathematics
from the University of Fribourg
in 1907. He was a professor in Fribourg (1911), and from 1920 at ETH Zurich
.
He worked in the areas of mathematical analysis
, mathematical physics
and algebra
, and is known for the Plancherel theorem
in harmonic analysis
.
Outside of math he was married to Cécile Tercier, had nine children, and presided at the Mission Catholique Française in Zürich
.
Switzerland
Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....
mathematician
Mathematician
A mathematician is a person whose primary area of study is the field of mathematics. Mathematicians are concerned with quantity, structure, space, and change....
. He was born in Bussy
Bussy, Fribourg
Bussy is a municipality in the district of Broye in the canton of Fribourg in Switzerland.-Geography:Bussy has an area, , of . Of this area, or 81.9% is used for agricultural purposes, while or 5.6% is forested...
(Fribourg
Canton of Fribourg
The Canton of Fribourg is a canton of Switzerland. It is located in the west of the country. The capital of the canton is Fribourg. The name Fribourg is French, whereas is the German name for both the canton and the town.-History:...
, Switzerland
Switzerland
Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....
) and obtained his diploma
Diploma
A diploma is a certificate or deed issued by an educational institution, such as a university, that testifies that the recipient has successfully completed a particular course of study or confers an academic degree. In countries such as the United Kingdom and Australia, the word diploma refers to...
in mathematics
Mathematics
Mathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...
from the University of Fribourg
University of Fribourg
The University of Fribourg is a university in the city of Fribourg, Switzerland.The roots of the University can be traced back to 1582, when the notable Jesuit Peter Canisius founded the Collège Saint-Michel in the City of Fribourg. In 1763, an Academy of law was founded by the state of Frobourg...
in 1907. He was a professor in Fribourg (1911), and from 1920 at ETH Zurich
ETH Zurich
The Swiss Federal Institute of Technology Zurich or ETH Zürich is an engineering, science, technology, mathematics and management university in the City of Zurich, Switzerland....
.
He worked in the areas of mathematical analysis
Mathematical analysis
Mathematical analysis, which mathematicians refer to simply as analysis, has its beginnings in the rigorous formulation of infinitesimal calculus. It is a branch of pure mathematics that includes the theories of differentiation, integration and measure, limits, infinite series, and analytic functions...
, mathematical physics
Mathematical physics
Mathematical physics refers to development of mathematical methods for application to problems in physics. The Journal of Mathematical Physics defines this area as: "the application of mathematics to problems in physics and the development of mathematical methods suitable for such applications and...
and algebra
Algebra
Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures...
, and is known for the Plancherel theorem
Plancherel theorem
In mathematics, the Plancherel theorem is a result in harmonic analysis, proved by Michel Plancherel in 1910. It states that the integral of a function's squared modulus is equal to the integral of the squared modulus of its frequency spectrum....
in harmonic analysis
Harmonic analysis
Harmonic analysis is the branch of mathematics that studies the representation of functions or signals as the superposition of basic waves. It investigates and generalizes the notions of Fourier series and Fourier transforms...
.
Outside of math he was married to Cécile Tercier, had nine children, and presided at the Mission Catholique Française in Zürich
Zürich
Zurich is the largest city in Switzerland and the capital of the canton of Zurich. It is located in central Switzerland at the northwestern tip of Lake Zurich...
.
External links
- Biography (in French): http://commonweb.unifr.ch/math/main/MichelPlancherel1.pdf