Joseph Fourier
Overview
French people
The French are a nation that share a common French culture and speak the French language as a mother tongue. Historically, the French population are descended from peoples of Celtic, Latin and Germanic origin, and are today a mixture of several ethnic groups...
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....
and physicist
Physicist
A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...
best known for initiating the investigation of Fourier series
Fourier series
In mathematics, a Fourier series decomposes periodic functions or periodic signals into the sum of a set of simple oscillating functions, namely sines and cosines...
and their applications to problems of heat transfer
Heat transfer
Heat transfer is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase-change transfer...
and vibrations. The Fourier transform
Fourier transform
In mathematics, Fourier analysis is a subject area which grew from the study of Fourier series. The subject began with the study of the way general functions may be represented by sums of simpler trigonometric functions...
and Fourier's Law are also named in his honour. Fourier is also generally credited with the discovery of the greenhouse effect
Greenhouse effect
The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions. Since part of this re-radiation is back towards the surface, energy is transferred to the surface and the lower atmosphere...
.
Fourier was born at Auxerre
Auxerre
Auxerre is a commune in the Bourgogne region in north-central France, between Paris and Dijon. It is the capital of the Yonne department.Auxerre's population today is about 45,000...
(now in the Yonne
Yonne
Yonne is a French department named after the Yonne River. It is one of the four constituent departments of Burgundy in eastern France and its prefecture is Auxerre. Its official number is 89....
département of France), the son of a tailor
Tailor
A tailor is a person who makes, repairs, or alters clothing professionally, especially suits and men's clothing.Although the term dates to the thirteenth century, tailor took on its modern sense in the late eighteenth century, and now refers to makers of men's and women's suits, coats, trousers,...
.
Unanswered Questions
Quotations
Primary causes are unknown to us; but are subject to simple and constant laws, which may be discovered by observation, the study of them being the object of natural philosophy. Heat, like gravity, penetrates every substance of the universe, its rays occupy all parts of space. The object of our work is to set forth the mathematical laws which this element obeys. The theory of heat will hereafter form one of the most important branches of general physics.
Ch. 1, p. 1
Profound study of nature is the most fertile source of mathematical discoveries.
Ch. 1, p. 7