Selling studied mathematics at the Universities of Göttingen and Munich (under Philipp Ludwig von Seidel). He obtained the doctorate in Munich in 1859, under the supervision of Bernhard Riemann.[c 1][1] On recommendation of Leopold Kronecker he became professor extraordinarius of mathematics at the University of Würzburg in 1860 – against the will of the philosophical faculty and the mathematics professor Aloys Mayr.[2] There, he also taught astronomy and became conservator-restorer at the astronomical department in 1879. In 1873[c 2] he wrote an important paper on binary and ternary quadratic forms which was also translated into French and cited by Henri Poincaré, Émile Picard and Paul Gustav Heinrich Bachmann.[3] Beginning with 1877 he also became concerned with insurance, and participated in the reorganization of the pensions in Bavaria on behalf of the Bavarian government. His application for a promotion to professor ordinarius was declined in 1891. In 1906 he became emeritus.
For his own extensive computations (for instance, signed-digit representation), he initially used computational machines by Thomas de Colmar with which he was not satisfied. Therefore, he built multiplication machines after the model of a Pantograph,[c 3] for which he got a patent in 1886, and a prize at the Chicago World's Fair in 1893. However, the machine was complicated to use and to produce, so it didn't gain much importance. Some 30 to 40 devices were produced until 1898. He also built a few copies of an improved version and designed a third electrical machine (patent in 1894). The later inventor of computational machines, Christel Hamann, participated in those constructions. Some copies of Selling's machine can be seen, for instance, in the Deutsches Museum in Munich.
^Hans-Joachim Vollrath: Über die Berufung von Aurel Voss auf den Lehrstuhl für Mathematik in Würzburg. In: Würzburger medizinhistorische Mitteilungen, Band 11, 1993, S. 133–151, hier: S. 133 und 145 f. (Eduard Sellings Antrag).
^Bachmann, Paul (1923). Zahlentheorie, Vierter Teil: Die Arithmetik der quadratischen Formen. Leipzig.
Works
^Selling (1859): Über Primzahlen und die Zusammensetzung der Zahlen aus ihnen in dem rationellen und in complex-irrationellen Zahlengebieten
^Selling, Eduard (1874) [1873]. "Ueber die binären und ternären quadratischen Formen". Journal für die reine und angewandte Mathematik. 77: 143–229.
^Selling, E. (1887). Eine neue Rechenmaschine. Berlin: Springer. doi:10.3931/e-rara-18446.
External links
Selling in Rechnerlexikon
History of Computer zu seinem Computer and Biographie
Stephan Weiss Die Multipliziermaschinen von Eduard Selling, 2004, pdf
Selling at History of mathematics in Würzburg
December 31, 2022
eduard, selling, november, 1834, ansbach, january, 1920, munich, german, mathematician, inventor, calculating, machines, portrait, selling, studied, mathematics, universities, göttingen, munich, under, philipp, ludwig, seidel, obtained, doctorate, munich, 1859. Eduard Selling 5 November 1834 in Ansbach 31 January 1920 in Munich was a German mathematician and inventor of calculating machines Portrait of Eduard Selling Selling studied mathematics at the Universities of Gottingen and Munich under Philipp Ludwig von Seidel He obtained the doctorate in Munich in 1859 under the supervision of Bernhard Riemann c 1 1 On recommendation of Leopold Kronecker he became professor extraordinarius of mathematics at the University of Wurzburg in 1860 against the will of the philosophical faculty and the mathematics professor Aloys Mayr 2 There he also taught astronomy and became conservator restorer at the astronomical department in 1879 In 1873 c 2 he wrote an important paper on binary and ternary quadratic forms which was also translated into French and cited by Henri Poincare Emile Picard and Paul Gustav Heinrich Bachmann 3 Beginning with 1877 he also became concerned with insurance and participated in the reorganization of the pensions in Bavaria on behalf of the Bavarian government His application for a promotion to professor ordinarius was declined in 1891 In 1906 he became emeritus For his own extensive computations for instance signed digit representation he initially used computational machines by Thomas de Colmar with which he was not satisfied Therefore he built multiplication machines after the model of a Pantograph c 3 for which he got a patent in 1886 and a prize at the Chicago World s Fair in 1893 However the machine was complicated to use and to produce so it didn t gain much importance Some 30 to 40 devices were produced until 1898 He also built a few copies of an improved version and designed a third electrical machine patent in 1894 The later inventor of computational machines Christel Hamann participated in those constructions Some copies of Selling s machine can be seen for instance in the Deutsches Museum in Munich References Edit Eduard Selling at the Mathematics Genealogy Project Hans Joachim Vollrath Uber die Berufung von Aurel Voss auf den Lehrstuhl fur Mathematik in Wurzburg In Wurzburger medizinhistorische Mitteilungen Band 11 1993 S 133 151 hier S 133 und 145 f Eduard Sellings Antrag Bachmann Paul 1923 Zahlentheorie Vierter Teil Die Arithmetik der quadratischen Formen Leipzig Works Edit Selling 1859 Uber Primzahlen und die Zusammensetzung der Zahlen aus ihnen in dem rationellen und in complex irrationellen Zahlengebieten Selling Eduard 1874 1873 Ueber die binaren und ternaren quadratischen Formen Journal fur die reine und angewandte Mathematik 77 143 229 Selling E 1887 Eine neue Rechenmaschine Berlin Springer doi 10 3931 e rara 18446 External links EditSelling in Rechnerlexikon History of Computer zu seinem Computer and Biographie Stephan Weiss Die Multipliziermaschinen von Eduard Selling 2004 pdf Selling at History of mathematics in Wurzburg Retrieved from https en wikipedia org w index php title Eduard Selling amp oldid 1033021655, wikipedia, wiki, book, books, library,
