|
Martin Ohm
Martin Ohm (May 6, 1792 in Erlangen – April 1, 1872 in Berlin) was a German mathematician and a younger brother of physicist Georg Ohm. Biography He earned his doctorate in 1811 at Friedrich-Alexander-University, Erlangen-Nuremberg where his advisor was Karl Christian von Langsdorf. In 1817, he was appointed professor of mathematics and physics in the gymnasium at Toruń, Thorn. In 1821 he moved to Berlin, and in 1839 became a full professor in the Humboldt University of Berlin, University of Berlin. He delivered courses of lectures at the academy of architecture from 1824 to 1831, and at the schools of artillery and engineering from 1833 to 1852; and he also taught in the military school from 1826 to 1849. Work Ohm was the first to fully develop the theory of the Exponential function, exponential ''a''''b'' when both ''a'' and ''b'' are complex numbers in 1823. The 1835 second edition of Ohm's textbook, ''Die reine Elementar Mathematik'' was the first time that Euclid's 'extr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Ohm2
Martin may refer to: Places Antarctica * Martin Peninsula, Marie Byrd Land * Port Martin, Adelie Land * Point Martin, South Orkney Islands Europe * Martin, Croatia, a village * Martin, Slovakia, a city * Martín del Río, Aragón, Spain * Martín River, a tributary of the Ebro river in Spain * Martin (Val Poschiavo), Switzerland England * Martin, Hampshire * Martin, Kent * Martin, East Lindsey, Lincolnshire, a hamlet and former parish * Martin, North Kesteven, Lincolnshire, a village and parish * Martin Hussingtree, Worcestershire * Martin Mere, a lake in Lancashire ** WWT Martin Mere, a wetland nature reserve that includes the lake and surrounding areas North America Canada * Rural Municipality of Martin No. 122, Saskatchewan, Canada * Martin Islands, Nunavut, Canada United States * Martin, Florida * Martin, Georgia * Martin, Indiana * Martin, Kentucky * Martin, Louisiana * Martin, Michigan * Martin, Nebraska * Martin, North Dakota * Martin, Ohio * Martin, South Carolina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adolf Zeising
Adolf Zeising (24 September 181027 April 1876) was a German psychologist, whose main interests were mathematics and philosophy. Among his theories, Zeising claimed to have found the golden ratio expressed in the arrangement of branches along the stems of plants and of veins in leaves. He extended his research to the skeletons of animals and the branchings of their veins and nerves, to the proportions of chemical compounds and the geometry of crystals, even to the use of proportion in artistic endeavors. In these phenomena he saw the golden ratio operating as a universal law, Many of his studies were followed by Gustav Fechner and Le Corbusier, who elaborated his studies of human proportion to develop the Modulor The Modulor is an anthropometric scale of proportions devised by the Swiss-born French architect Le Corbusier (1887–1965). It was developed as a visual bridge between two incompatible scales, the Imperial and the metric systems. It is base ..... Hermann Lotze, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1872 Deaths
Events January * January 12 – Yohannes IV is crowned Emperor of Ethiopia in Axum, the first ruler crowned in that city in over 500 years. *January 20 – The Cavite mutiny was an uprising of Filipino military personnel of Fort San Felipe, the Spanish arsenal in Cavite, Philippine Islands.Foreman, J., 1906, The set course for her patrol area off the northeastern coast of the main Japanese island Honshū. She arrived, New York: Charles Scribner's Sons February * February 2 – The government of the United Kingdom buys a number of forts on the Gold Coast, from the Netherlands. * February 4 – A great solar flare, and associated geomagnetic storm, makes northern lights visible as far south as Cuba. * February 13 – Rex, the most famous parade on Mardi Gras, parades for the first time in New Orleans for Grand Duke Alexei Alexandrovich of Russia. * February 17 – Filipino priests José Burgos, Mariano Gomez and Jacinto Zamora, collective ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1792 Births
Events January–March * January 9 – The Treaty of Jassy ends the Russian Empire's war with the Ottoman Empire over Crimea. * January 25 – The London Corresponding Society is founded. * February 18 – Thomas Holcroft produces the comedy ''The Road to Ruin (play), The Road to Ruin'' in London. * February 20 ** The Postal Service Act, establishing the United States Postal Service, United States Post Office Department, is signed by President George Washington.''Harper's Encyclopaedia of United States History from 458 A. D. to 1909'', ed. by Benson John Lossing and, Woodrow Wilson (Harper & Brothers, 1910) p169 ** Parliament House, Dublin catches fire during a legislative session. "Although in imminent danger of the roof falling in," it is noted later, "the House did not adjourn until a proper motion had been put and carried in the affirmative.""Fires, Great", in ''The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connect ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
19th-century German Mathematicians
The 19th century began on 1 January 1801 (represented by the Roman numerals MDCCCI), and ended on 31 December 1900 (MCM). It was the 9th century of the 2nd millennium. It was characterized by vast social upheaval. Slavery was abolished in much of Europe and the Americas. The First Industrial Revolution, though it began in the late 18th century, expanded beyond its British homeland for the first time during the 19th century, particularly remaking the economies and societies of the Low Countries, France, the Rhineland, Northern Italy, and the Northeastern United States. A few decades later, the Second Industrial Revolution led to ever more massive urbanization and much higher levels of productivity, profit, and prosperity, a pattern that continued into the 20th century. The Catholic Church, in response to the growing influence and power of modernism, secularism and materialism, formed the First Vatican Council in the late 19th century to deal with such problems and confirm ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friedrich Prym
Friedrich Emil Fritz Prym (28 September 1841, Düren – 15 December 1915, Bonn) was a German mathematician who introduced Prym varieties and Prym differentials. Prym completed his Ph.D. at the Humboldt University of Berlin, University of Berlin in 1863 with a thesis written under the direction of Ernst Kummer and Martin Ohm. In 1867 he started a Professor at the University of Würzburg, where he later became Dean, and then Rector (academia), Rector in 1897–98. References * External links * *Picture of Prym 19th-century German mathematicians 1841 births 1915 deaths Humboldt University of Berlin alumni Algebraic geometers Academic staff of the University of Würzburg Complex analysts 20th-century German mathematicians {{Germany-mathematician-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leo Pochhammer
Leo August Pochhammer (25 August 1841, Stendal – 24 March 1920, Kiel) was a Prussian mathematician who was known for his work on special functions and introduced the Pochhammer symbol, now generally used for expressing hypergeometric functions in a compact notation. Life Pochhammer was born in Stendal, but grew up in Berlin. He studied mathematics and physics at the Friedrich Wilhelm University in Berlin from 1859 to 1863. He received his doctorate in 1863 from Ernst Eduard Kummer. A period of habilitation followed in 1872. For the next two years he was a lecturer in Berlin. In 1874 he became Professor at the Christian Albrechts University in Kiel. After the Mathematical Seminar was founded at the same university in 1877, a second chair for mathematics was established with the appointment of Pochhammer as full professor. On 22 May 1877, regulations for the mathematical seminar at the Royal University in Kiel were issued. Along with the German mathematician and astronomer G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rudolf Lipschitz
Rudolf Otto Sigismund Lipschitz (14 May 1832 – 7 October 1903) was a German mathematician who made contributions to mathematical analysis (where he gave his name to the Lipschitz continuity condition) and differential geometry, as well as number theory, algebras with involution and classical mechanics. Biography Rudolf Lipschitz was born on 14 May 1832 in Königsberg. He was the son of a landowner and was raised at his father's estate at Bönkein which was near Königsberg. He entered the University of Königsberg when he was 15, but later moved to the University of Berlin where he studied with Gustav Dirichlet. Despite having his studies delayed by illness, in 1853 Lipschitz graduated with a PhD in Berlin. After receiving his PhD, Lipschitz started teaching at local Gymnasiums. In 1857 he married Ida Pascha, the daughter of one of the landowners with an estate near to his father's, and earned his habilitation at the University of Bonn, where he remained as a privatdozent. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eduard Heine
Heinrich Eduard Heine (16 March 1821 – 21 October 1881) was a German mathematician. Heine became known for results on special functions and in real analysis. In particular, he authored an important treatise on spherical harmonics and Legendre functions (''Handbuch der Kugelfunctionen''). He also investigated basic hypergeometric series. He introduced the Mehler–Heine formula. Biography Heinrich Eduard Heine was born on 16 March 1821 in Berlin, as the eighth child of banker Karl Heine and his wife Henriette Märtens. Eduard was initially home schooled, then studied at the Friedrichswerdersche Gymnasium and Köllnische Gymnasium in Berlin. In 1838, after graduating from gymnasium, he enrolled at the University of Berlin, but transferred to the University of Göttingen to attend the mathematics lectures of Carl Friedrich Gauss and Moritz Stern. In 1840 Heine returned to Berlin, where he studied mathematics under Peter Gustav Lejeune Dirichlet, while also attending cla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Bachmann
Paul Gustav Heinrich Bachmann (22 June 1837 – 31 March 1920) was a German mathematician. Life Bachmann studied mathematics at the university of his native city of Berlin and received his doctorate in 1862 for his thesis on group theory. He then went to Breslau to study for his habilitation, which he received in 1864 for his thesis on Complex Units. He was a professor at Breslau and later at Münster. Works *''Zahlentheorie'', Bachmann's work on number theory in five volumes (1872-1923): **Vol. I: Die Elemente der Zahlentheorie' (1892) **Vol. II: Analytische Zahlentheorie' (1894), a work on analytic number theory in which Big O notation was first introduced **Vol. III: Die Lehre von der Kreistheilung und ihre Beziehungen zur Zahlentheorie' (first published in 1872) **Vol. IV (Part 1): Die Arithmetik der quadratischen Formen' (1898) **Vol. IV (Part 2): Die Arithmetik der quadratischen Formen' (posthumously published in 1923) **Vol. V: Allgemeine Arithmetik der Zahlenkörper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elwin Bruno Christoffel
Elwin Bruno Christoffel (; 10 November 1829 – 15 March 1900) was a German mathematician and physicist. He introduced fundamental concepts of differential geometry, opening the way for the development of tensor calculus, which would later provide the mathematical basis for general relativity. Life Christoffel was born on 10 November 1829 in Montjoie (now Monschau) in Prussia in a family of cloth merchants. He was initially educated at home in languages and mathematics, then attended the Jesuit Gymnasium and the Friedrich-Wilhelms Gymnasium in Cologne. In 1850 he went to the University of Berlin, where he studied mathematics with Gustav Dirichlet (which had a strong influence over him) among others, as well as attending courses in physics and chemistry. He received his doctorate in Berlin in 1856 for a thesis on the motion of electricity in homogeneous bodies written under the supervision of Martin Ohm, Ernst Kummer and Heinrich Gustav Magnus. After receiving his doctorate, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golden Section
In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their summation, sum to the larger of the two quantities. Expressed algebraically, for quantities and with , is in a golden ratio to if \frac = \frac = \varphi, where the Greek letter Phi (letter), phi ( or ) denotes the golden ratio. The constant satisfies the quadratic equation and is an irrational number with a value of The golden ratio was called the extreme and mean ratio by Euclid, and the divine proportion by Luca Pacioli; it also goes by other names. Mathematicians have studied the golden ratio's properties since antiquity. It is the ratio of a regular pentagon's diagonal to its side and thus appears in the Straightedge and compass construction, construction of the dodecahedron and icosahedron. A golden rectangle—that is, a rectangle with an aspect ratio of —may be cut into a square and a smaller rectangle with the same aspect ratio. The golden ratio has bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
