Paul Matthieu Hermann Laurent

Hermann Laurent (fully Matthieu Hermann Laurent Paul ) ( born September 2, 1841 in the city of Luxembourg, † February 19, 1908 in Paris) was a French mathematician.

Life

His parents were Auguste Laurent and Anne -Françoise Schrobilgen. Hermann was born in Luxembourg, but then grew up in France in Bordeaux, where his father, an eminent chemist, a chair held. After his death in 1853, he studied at the École Polytechnique in Paris and the École d' Application in Metz. He joined the military, which he left in 1865 as an officer. Since 1862 Laurent wrote mathematical works, he published the first 1865. 1866, he received his doctoral thesis a position at the Polytechnique, he left again from 1870 to 1871, when he re-entered active military service in the Franco-German War.

Since 1871 Laurent worked as an actuary. In 1874 he married Berthe Moutard. In 1889 he became professor at the Paris Ecole Agronomique, 1905, he was inducted into the Legion of Honor. Hermann Laurent died on 19 February 1908 in Paris.

Work

Laurent's first work of 1862 was called Traité des séries (Treatise on rows ), in 1865 he published the Traité des Résidus (Treatise on residuals ). He wrote a total of 30 books and a number of smaller texts. His main area of ​​work was the analysis, especially lines and differential equations; but he also dealt with geometry and statistics, including mortality tables. He was considered an influential high school teacher and textbook author ( Traité d' arithmétique, Traité d'analyze ), where he bureaucratic reasons partly pseudonyms CA Laisant and E. Lemoine used ( a university examiner was not allowed to publish on his test area ). One of his contributions is the Laurent- loop in the Fractional Calculus.

The Laurent series are named after Pierre Alphonse Laurent contrast ( 1813-1854 ). However, Hermann Laurent also worked on these series.