August Leopold Crelle

August Leopold Crelle ( born March 17, 1780 in Eichwerder ( at Wriezen ); † October 6, 1855 in Berlin) was a German mathematician, architect and engineer. He is particular as the founder of the Journal for Pure and Applied Mathematics, also called " Crelle Journal," known.

Life

Crelle his knowledge lent itself without education at through their own reading. He showed a special inclination towards mathematics, and later to the state science. 1803 /04 he accompanied David Gilly on a three-month study trip to Paris. Outer circumstances let him then take the road constructors. After he had held several minor positions in the Prussian State Building, he was appointed to the Privy Oberbaurat and a member of the Upper Baudirektion later. Most 1816-1826 built in the Prussian statecraft roads were built with the participation of the Berlin- Potsdam Railway even after his design.

He founded in 1826 the Journal for Pure and Applied Mathematics, also called short " Crelle's Journal ," and was its editor. The journal was the first major mathematical journal, which was not affiliated with an academy, and the beginning of the 19th century, the leading mathematical journal. The company still exists today. In the very beginning, it succeeded Crelle to gain significant mathematicians such as the Berlin Jakob Steiner, Peter Gustav Lejeune Dirichlet, Ernst Eduard Kummer, Carl Gustav Jacobi, Gotthold Eisenstein and especially Niels Henrik Abel as authors. With these he was able to establish itself successfully against the then prevailing French magazines. Crelle itself was a regular fixture in the scientific and social life of Berlin.

Already since 1815 Oberbaurat, he became in 1828 a member of the Prussian Academy of Sciences. In 1849 he resigned for health reasons from the civil service.

In memory of the mathematician and architect since 1958 bears the Crellestraße in the Berlin district of Schöneberg - near the railway line designed by him - his name.

As a mathematician, he found new results in the triangular geometry (1816 ), as he considered the task to find a point inside the triangle, where the links to the corners same part angle with the sides. Starting from the same problem, the results of Henri Brocard in France in 1875 were recovered.