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Gerhard Christoph Hermann Vechtmann
Gerhard Christoph Hermann Vechtmann (10 April 1817 – 2 August 1857) was a German mathematician, who is best known for his work on lemniscates. Vechtman was born in Wittmund in the northern part of the Kingdom of Hanover in Germany, where his father worked as a preacher. From the ages 10 to 15 he attended the local school in Wittmund before attending the Gymnasium (school), gymnasium (high school) in neighbouring Aurich for three years. After school Vechtmann went on to study math and sciences in Berlin and Göttingen. In Göttingen he became a member of the pedagogic seminar (institute for teacher education) and taught at the local gymnasium until he was appointed ''Hofmeister'' at the ''Ritterakademie'' in Lüneburg in 1841. In 1843 he handed in his dissertation ''De curvis lemniscatis'' at the University of Göttingen and was awarded a Doctor of Philosophy. At the end of 1845 he became a teacher for math and sciences at a school in Eutin and 1848 he was made the vice principal a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lemniscate
In algebraic geometry, a lemniscate is any of several figure-eight or -shaped curves. The word comes from the Latin "''lēmniscātus''" meaning "decorated with ribbons", from the Greek λημνίσκος meaning "ribbons",. or which alternatively may refer to the wool from which the ribbons were made. Curves that have been called a lemniscate include three quartic plane curves: the hippopede or lemniscate of Booth, the lemniscate of Bernoulli, and the lemniscate of Gerono. The study of lemniscates (and in particular the hippopede) dates to ancient Greek mathematics, but the term "lemniscate" for curves of this type comes from the work of Jacob Bernoulli in the late 17th century. History and examples Lemniscate of Booth The consideration of curves with a figure-eight shape can be traced back to Proclus, a Greek Neoplatonist philosopher and mathematician who lived in the 5th century AD. Proclus considered the cross-sections of a torus by a plane parallel to the axis of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meldorf
Meldorf ( Holsatian: ''Meldörp'' or ''Möldörp'') is a town in western Schleswig-Holstein, Germany, that straddles the river Miele in the district of Dithmarschen. Overview Meldorf was first mentioned in writing before 1250 AD. In 1265 it received its municipal rights and served as the capital of Dithmarschen, a peasant republic with Allies in the Hanseatic league dating from 1468. The city was sacked in 1500 AD when King John of the Kalmar Union attempted to conquer the republic. His forces were routed by a force with poor arms and inferior numbers in the Battle of Hemmingstedt. In 1559, the republic was conquered. The city lost its municipal rights again in 1598 and would not regain them until 1870. It was county town until 1970 of the district Süderdithmarschen. After a district reform Süderdithmarschen and Norderdithmarschen merged to Dithmarschen and Meldorf lost the capitalship to the town of Heide. The St. John's Church (St.-Johannis-Kirche), also called Meldorfe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
People From The Kingdom Of Hanover
A person ( : people) is a being that has certain capacities or attributes such as reason, morality, consciousness or self-consciousness, and being a part of a culturally established form of social relations such as kinship, ownership of property, or legal responsibility. The defining features of personhood and, consequently, what makes a person count as a person, differ widely among cultures and contexts. In addition to the question of personhood, of what makes a being count as a person to begin with, there are further questions about personal identity and self: both about what makes any particular person that particular person instead of another, and about what makes a person at one time the same person as they were or will be at another time despite any intervening changes. The plural form "people" is often used to refer to an entire nation or ethnic group (as in "a people"), and this was the original meaning of the word; it subsequently acquired its use as a plural form of p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1857 Deaths
Events January–March * January 1 – The biggest Estonian newspaper, ''Postimees'', is established by Johann Voldemar Jannsen. * January 7 – The partly French-owned London General Omnibus Company begins operating. * January 9 – The 7.9 Fort Tejon earthquake shakes Central and Southern California, with a maximum Mercalli intensity of IX (''Violent''). * January 24 – The University of Calcutta is established in Calcutta, as the first multidisciplinary modern university in South Asia. The University of Bombay is also established in Bombay, British India, this year. * February 3 – The National Deaf Mute College (later renamed Gallaudet University) is established in Washington, D.C., becoming the first school for the advanced education of the deaf. * February 5 – The Federal Constitution of the United Mexican States is promulgated. * March – The Austrian garrison leaves Bucharest. * March 3 ** France and the United King ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1817 Births
Events January–March * January 1 – Sailing through the Sandwich Islands, Otto von Kotzebue discovers New Year Island. * January 19 – An army of 5,423 soldiers, led by General José de San Martín, starts crossing the Andes from Argentina, to liberate Chile and then Peru. * January 20 – Ram Mohan Roy and David Hare found Hindu College, Calcutta, offering instructions in Western languages and subjects. * February 12 – Battle of Chacabuco: The Argentine–Chilean patriotic army defeats the Spanish. * March 3 ** President James Madison vetoes John C. Calhoun's Bonus Bill. ** The U.S. Congress passes a law to split the Mississippi Territory, after Mississippi drafts a constitution, creating the Alabama Territory, effective in August. * March 4 – James Monroe is sworn in as the fifth President of the United States. * March 21 – The flag of the Pernambucan Revolt is publicly blessed by the dean of Recife Cathedral, Brazil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lemniscate Of Bernoulli
In geometry, the lemniscate of Bernoulli is a plane curve defined from two given points and , known as foci, at distance from each other as the locus of points so that . The curve has a shape similar to the numeral 8 and to the ∞ symbol. Its name is from , which is Latin for "decorated with hanging ribbons". It is a special case of the Cassini oval and is a rational algebraic curve of degree 4. This lemniscate was first described in 1694 by Jakob Bernoulli as a modification of an ellipse, which is the locus of points for which the sum of the distances to each of two fixed ''focal points'' is a constant. A Cassini oval, by contrast, is the locus of points for which the ''product'' of these distances is constant. In the case where the curve passes through the point midway between the foci, the oval is a lemniscate of Bernoulli. This curve can be obtained as the inverse transform of a hyperbola, with the inversion circle centered at the center of the hyperbola (bise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eduard Alberti
Eduard Alberti (11 March 1827 – 28 February 1898) was a German literary historian and philosopher. His surviving published output includes approximately twenty biographical entries in '' Allgemeine Deutsche Biographie''. Life Eduard Christian Scharlau Alberti was born in Friedrichstadt, at that time in the Duchy of Schleswig. He attended school in his hometown and then, between 1844 and Easter 1848, undertook a training in printing and book production ( ''"Buchdruck"''). He then returned to school, switching to a Gelehrtenschule (Pre-university academy) in nearby Husum. In 1850, in further pursuit of his academic objectives, he enrolled at the University of Kiel where, primarily under the supervision of Peter Wilhelm Forchhammer, he studied classical philology, passing his final exams in the first part of 1854. After this, till 1856 Alberti worked as a home tutor in Schwansen, employed by the family of the jurist-politician . At the same time he worked on his doctora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rendsburg
Rendsburg ( da, Rendsborg, also ''Rensborg'', nds, Rendsborg, also ''Rensborg'') is a town on the River Eider and the Kiel Canal in the central part of Schleswig-Holstein, Germany. It is the capital of the ''Kreis'' (district) of Rendsburg-Eckernförde. , it had a population of 28,476. History Rendsburg's foundation date is unknown though some form of fortifications was established by Bjørn Svendsen 1099–1100. Rendsburg was first mentioned in 1199. An old form of its name was Reinoldesburch. It became a part of Holstein in the 13th century, but was transferred to Schleswig in 1460. Many times the town passed from Danish to German control and vice versa. In the German-Danish War in 1864 Rendsburg was finally seized by Kingdom of Prussia and Austria. After 1866 the town was annexed by the Kingdom of Prussia. Since that time it has remained part of Germany. Although the Eider is navigable for small craft from its mouth on the North Sea to Rendsburg, the town's importance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutin
Eutin () is the district capital of Eastern Holstein county located in the northern German state of Schleswig-Holstein. As of 2020, the town had some 17,000 inhabitants. History The name Eutin (originally Utin) is of Slavic origin. Its meaning is not quite clear; it is probably derived from the personal name "Uta". The Slavic Obotrites tribe settled eastern Holstein in the 7th/8th centuries A.D. and built a castle on Pheasant Island in the lake now called the Großer Eutiner See. The originally Slavonic settlement of ''Utin'' was populated in the twelfth century by Dutch settlers. In 1156 Eutin became a market town. Town rights were granted in the year 1257. It later became the seat of the Prince-Bishopric of Lübeck, as Lübeck itself was an imperial free city. When the bishopric was secularized in 1803, Eutin became part of the Duchy of Oldenburg. As a result of the Greater Hamburg Act of 1937, Eutin passed from the Free State of Oldenburg to the Prussian Province of Schleswig- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wittmund
Wittmund is a town and capital of the district of Wittmund, in Lower Saxony, Germany. Geography Wittmund is a town of 21,000 inhabitants located in Germany's historic coastal district of East Frisia, between the towns of Aurich and Jever. The town's borough covers an area of which make it one of the largest boroughs in Lower Saxony. While the town of Wittmund is about from the North Sea coast, its borough includes the little port of Harlesiel which is the starting point for ferries to the island of Wangerooge. Harlesiel is named after the Harle, a small river that starts and finishes within Wittmund borough. (A ''siel'' is a sluice in a dyke. At low tide, water from the river may flow into the sea.) Villages: - Ardorf - Asel - Blersum - Berdum - Burhafe - Buttforde - Carolinensiel - Eggelingen - Funnix - Hovel - Leerhafe - Uttel - Willen Towns: - Wittmund Mayor Since November 1, 2006, Rolf Claußen is the mayor of Wittmund. He was reelected in 2014. History The town of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Doctor Of Philosophy
A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields. Because it is an earned research degree, those studying for a PhD are required to produce original research that expands the boundaries of knowledge, normally in the form of a dissertation, and defend their work before a panel of other experts in the field. The completion of a PhD is often a requirement for employment as a university professor, researcher, or scientist in many fields. Individuals who have earned a Doctor of Philosophy degree may, in many jurisdictions, use the title '' Doctor'' (often abbreviated "Dr" or "Dr.") with their name, although the proper etiquette associated with this usage may also be subject to the professional ethics of their own scholarly field, culture, or society. Those who teach at universities or work in academic, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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