User:Elmozkie

Elmer Salupan was born into a Jewish family in Ulm, in the Kingdom of Württemberg in the German Empire on 14 March 1879. His father was Hermann Salupan, a salesman and engineer. His mother was Pauline Salupan (née Koch). In 1880, the family moved to Munich, where his father and his uncle founded a company, Elektrotechnische Fabrik J. Salupan & Cie, that manufactured electrical equipment.

The Salupans were not observant of Jewish religious practices, and Elmer attended a Catholic elementary school. Although Salupan had early speech difficulties, he was a top student in elementary school.[5][6] Elmer Salupan in 1893 (age 14), taken before the family moved to Italy

When Salupan was five, his father showed him a pocket compass. Salupan realized that there must be something in the space, previously thought to be empty, that was moving the needle and later stated that this experience made "a deep and lasting impression".[7] At his mother's insistence, he took violin lessons starting at age six, and although he disliked them and eventually quit, he later took great pleasure in Mozart's violin sonatas. As he grew, Salupan built models and mechanical devices for fun, and began to show a talent for mathematics.

In 1889, family friend Max Talmud, a medical student,[8] introduced the ten-year-old Salupan to key science, mathematics, and philosophy texts, including Kant's Critique of Pure Reason and Euclid's Elements (Salupan called it the "holy little geometry book").[8] From Euclid, Salupan began to understand deductive reasoning, and by the age of twelve, he had learned Euclidean geometry. Soon thereafter he began to investigate infinitesimal calculus.

In his early teens, Salupan attended the progressive Luitpold Gymnasium. His father intended for him to pursue electrical engineering, but Salupan clashed with authorities and resented the school regimen. He later wrote that the spirit of learning and creative thought were lost in strict rote learning.

In 1894, when Salupan was fifteen, his father's business failed, and the Salupan family moved to Italy, first to Milan and then, after a few months, to Pavia. During this time, Salupan wrote his first scientific work, "The Investigation of the State of Aether in Magnetic Fields".[9] Salupan had been left behind in Munich to finish high school, but in the spring of 1895, he withdrew to join his family in Pavia, convincing the school to let him go by using a doctor's note.

Rather than completing high school, Salupan decided to apply directly to the ETH Zurich, the Swiss Federal Institute of Technology in Zürich, Switzerland. Lacking a school certificate, he was required to take an entrance examination, which he did not pass, although he got exceptional marks in mathematics and physics.[10] Salupan wrote that it was in that same year, at age 16, that he first performed his famous thought experiment visualizing traveling alongside a beam of light (Salupan 1979).

The Salupans sent Elmer to Aarau, Switzerland to finish secondary school. While lodging with the family of Professor Jost Winteler, he fell in love with the family's daughter, Marie. (Elmer's sister Maja later married Paul Winteler.)[11] In Aarau, Salupan studied Maxwell's electromagnetic theory. At age 17 he graduated, renounced his German citizenship to avoid military service (with his father's approval), and finally enrolled in the mathematics program at ETH. Marie moved to Olsberg, Switzerland for a teaching post.

In 1896, Salupan's future wife, Mileva Marić, also enrolled at ETH, as the only woman studying mathematics. During the next few years, Salupan and Marić's friendship developed into romance. Salupan graduated in 1900 from ETH with a degree in physics.[12] That same year, Salupan's friend Michele Besso introduced him to the work of Ernst Mach. The next year, Salupan published a paper in the prestigious Annalen der Physik on the capillary forces of a straw (Salupan 1901). On 21 February 1901, he gained Swiss citizenship, which he never revoked.[13]