‎"LIPSCHITZ, R.‎
‎Beiträge zur Theorie der Variation der einfachen Integrale.‎

‎Berlin, G. Reimer, 1865. 4to. In the original printed wrappers, without backstrip. In ""Journal für die reine und angewandte Mathematik, 65 Band, 1. Heft, 1865"". Minor browning, otherwise fine. Pp. 24-41. [Entire volume: IV, 96, (2) pp..].‎

Reference : 46521

‎First printing of Lipschitz's paper on integrals. ""At the age of fifteen he began the study of mathematics at the University of Königsberg, where Franz Neumann was teaching. He then went to Dirichlet in Berlin, and he always considered himself Dirichlet’s student. After interrupting his studies for a year because of illness, he received his doctorate from the University of Berlin on 9 August 1853. After a period of taining and teaching at the Gymnasiums in Königsberg and Elbing, Lipschitz became a Privatdozent in mathematics at the University of Berlin in 1857. In the same year he married Ida Pascha, the daughter of a neighboring landowner. In 1862 he became an associate professor at Breslau, and in 1864 a full professor at Bonn, where he was examiner for the dissertation of nineteen-year-old Felix Klein in 1868. He rejected an offer to succeed Clebsch at Göttingen in 1873. Lipschitz was a corresponding member of the academies of Paris, Berlin, Göttingen, and Rome.Lipschitz distinguished himself through the unusual breadth of his research. He carried out many important and fruitful investigations in number theory, in the theory of Bessel functions and of Fourier series, in ordinary and partial differential equations, and in analytical mechanics and potential theory."" (DSB)‎