Carl Gottfried Neumann was a German Mathematician, born May 7, 1832 in Königsberg (now Kaliningrad, Russia) and died March 27, 1925 in Leipzig. May 7 is the 127th day of the year in the Gregorian Calendar (128th in leap years). ... 1832 was a leap year starting on Sunday (see link for calendar). ... Königsberg may refer to: The city of Kaliningrad in Russia, until 1945 Königsberg, the capital of East Prussia. ... Map of Kaliningrad Oblast Kaliningrad (Russian: Калининград, German: Königsberg, Polish: Królewiec, Lithuanian: KaraliauÄius) is a seaport city, capital and main city of the Kaliningrad Oblast, the Russian exclave between Poland and Lithuania with access to the Baltic Sea. ... March 27 is the 86th day of the year in the Gregorian Calendar (87th in Leap years). ... 1925 was a common year starting on Thursday (link will take you to calendar). ... Map of Germany showing Leipzig Leipzig? [ˈlaiptsɪç] (Polish; Sorbian/Lusatian: Lipsk) is the largest city in the federal state (Bundesland) of Saxony in Germany. ...
Neumann worked on the Dirichlet principle, and can be considered one of the initiators of the theory of integral equations. The Neumann series, which is analogous to the geometric series In mathematics, Dirichlet problems are a class of partial differential equation (PDE) problems which ask you to solve for the values of a function in a region given the value of the function on the boundary of that region. ... In mathematics, an integral equation is an equation in which an unknown function appears under an integral sign. ... In mathematics, a geometric progression is a sequence of numbers such that the quotient of any two successive members of the sequence is a constant called the common ratio of the sequence. ...
but for infinite matrices, is named after him. For the square matrix section, see square matrix. ...
Together with Alfred Clebsch he founded the mathematical research journal Mathematische Annalen. Alfred Clebsch (1832-1872) was a German mathematician who made important contributions to algebraic geometry and invariant theory. ... The Mathematische Annalen is a German mathematical research journal published by Springer-Verlag. ...
In 1815 he interrupted his studies at Berlin to serve as a volunteer in the campaign against Napoleon, and was wounded in the battle of Ligny.
In 1831, from a study of the specific heats of compounds, he formulated Neumann's law, which expressed in modern language runs: The molecular heat of a compound is equal to the sum of the atomic heats of its constituents.
His son, CarlGottfriedNeumann (1832-1925), became in 1858 Privatdozent, and in 1863 extraordinary professor of mathematics at Halle.
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