Jean-Marie Constant Duhamel | |
---|---|
Born |
Saint-Malo,
Ille-et-Vilaine, France | 5 February 1797
Died | 29 April 1872 Paris, France | (aged 75)
Known for |
Duhamel's formula Duhamel's integral Duhamel's principle Vibroscope |
Scientific career | |
Fields |
Mathematics Physics |
Jean-Marie Constant Duhamel ( /ˌdjuːəˈmɛl/; [1] French: [dy.amɛl]; 5 February 1797 – 29 April 1872) was a French mathematician and physicist.
His studies were affected by the troubles of the Napoleonic era. He went on to form his own school École Sainte-Barbe. Duhamel's principle, a method of obtaining solutions to inhomogeneous linear evolution equations, is named after him. He was primarily a mathematician but did studies on the mathematics of heat, mechanics, and acoustics. [2] He also did work in calculus using infinitesimals. Duhamel's theorem for infinitesimals says that the sum of a series of infinitesimals is unchanged by replacing the infinitesimal with its principal part. [3]
In 1853 he published about an early recording device he called a vibroscope. Like other similar devices, the vibroscope was a type of measuring device similar to an oscilloscope, and could not play back the etchings it recorded. [4]
Jean-Marie Constant Duhamel | |
---|---|
Born |
Saint-Malo,
Ille-et-Vilaine, France | 5 February 1797
Died | 29 April 1872 Paris, France | (aged 75)
Known for |
Duhamel's formula Duhamel's integral Duhamel's principle Vibroscope |
Scientific career | |
Fields |
Mathematics Physics |
Jean-Marie Constant Duhamel ( /ˌdjuːəˈmɛl/; [1] French: [dy.amɛl]; 5 February 1797 – 29 April 1872) was a French mathematician and physicist.
His studies were affected by the troubles of the Napoleonic era. He went on to form his own school École Sainte-Barbe. Duhamel's principle, a method of obtaining solutions to inhomogeneous linear evolution equations, is named after him. He was primarily a mathematician but did studies on the mathematics of heat, mechanics, and acoustics. [2] He also did work in calculus using infinitesimals. Duhamel's theorem for infinitesimals says that the sum of a series of infinitesimals is unchanged by replacing the infinitesimal with its principal part. [3]
In 1853 he published about an early recording device he called a vibroscope. Like other similar devices, the vibroscope was a type of measuring device similar to an oscilloscope, and could not play back the etchings it recorded. [4]