Siegfried Heinrich Aronhold
Siegfried Heinrich Aronhold (* July 16, 1819 in Angerburg, † March 13, 1884 in Berlin) was a German mathematician and physicist. He is considered the creator of the theory of invariants in Germany.
Biography
Aronhold was the son of a businessman and attended elementary school in Angerburg and until the death of his father, the Duke -Albrechts- school ( Rastenburg ). After the widowed mother had gone with the children to Königsberg, he attended the old-urban school until 1841. He then studied at the Albertus University of Königsberg mathematics, astronomy and physics at Friedrich Wilhelm Bessel, Friedrich Julius Richelot, Otto Hesse, Franz Ernst Neumann and Carl Gustav Jacob Jacobi. During this time Aronhold was honored as a member of the Mathematical Seminar at the University two times for the best work, but finished his studies in 1845 in Königsberg without degree and followed Jacobi to Berlin, where he independently dealt with mathematical problems. This made him Jacobi also with Peter Gustav Lejeune Dirichlet, Jacob Steiner, Heinrich Gustav Magnus and Heinrich Wilhelm Dove known, whose lectures he heard. During this time, he already dealt with higher mathematics. However, he did not obtain a permanent job, but could earn his livelihood only by private lessons to some extent.
His treatise Concerning the homogeneous functions of the third order of three variables in the 39th gang of August Crelle Journal for Pure and Applied Mathematics from 1849 impressed the Faculty of Arts at the Albertina in Königsberg, so that his subsequent work " About a new algebraic principle " as a dissertation has been recognized by this and him the doctorate was awarded. Aronhold wrote more papers in Crelle's Journal and in the monthly reports of the Berlin Academy. In 1850 he became a member of the Physical Society of Berlin and has published several articles in their annual reports. From 1851 he lectured at the Berlin Building Academy exceptionally, his habilitation in 1852, and was transferred in 1859 the discipline integral calculus. Besides, he also taught from 1852 to 1854 at the United Artillery and Engineering School. In 1860 he received the Berlin Industrial Institute a teaching and married Julie Marie Friederike Hayn, daughter of a Health Council. From his marriage two daughters and one son.
In 1862 he took over at the Commercial Institute all lessons in mathematics and received the title of professor in 1863, at the beginning of the following year the chair of pure mathematics. Since the Commercial Institute had no right to award doctorates, even Aronhold himself could not graduate its students. In 1869 he was awarded a corresponding member of the Royal Society of Sciences in Göttingen, and 4 with the Red Eagle Order class. After the merger of the School of Architecture and Industry Institute of the Technical University Berlin in 1879 Aronhold was briefly until the beginning of July 1880 there prorector. Different Call of established universities outside Berlin, he did not follow. On the occasion of his retirement in 1883 he was once again the Red Eagle Order, this time 3rd class with ribbon, awarded.
Honors
- No later than 1885: Honorary dignity to the doctor by the Albertus University of Königsberg