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Georg Mohr
Jørgen Mohr (Latinised ''Georg(ius) Mohr''; 1 April 1640 – 26 January 1697) was a Danish mathematician, known for being the first to prove the Mohr–Mascheroni theorem, which states that any geometric construction which can be done with compass and straightedge can also be done with compasses alone. Biography Mohr was born in Copenhagen, the son of a tradesman named David Mohrendal. Beginning in 1662 he traveled to the Netherlands, to study mathematics with Christiaan Huygens.. In 1672 he published his first book, '' Euclides Danicus'', simultaneously in Copenhagen and Amsterdam, in Danish and Dutch respectively. This book, proving the Mohr–Mascheroni theorem 125 years earlier than Lorenzo Mascheroni, would languish in obscurity until its rediscovery in 1928.. Mohr served in Franco-Dutch War in 1672–1673, and was taken prisoner by the French. By 1673, he had published his second book, ''Compendium Euclidis Curiosi''. A third book was later mentioned by Mohr's son; for man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euclides Danicus
''Euclides Danicus'' (the Danish Euclid) is one of three books of mathematics written by Georg Mohr. It was published in 1672 simultaneously in Copenhagen and Amsterdam, in Danish and Dutch respectively. It contains the first proof of the Mohr–Mascheroni theorem, which states that every geometric construction that can be performed using a compass and straightedge can also be done with compass alone.. The book is divided into two parts. In the first part, Mohr shows how to perform all of the constructions of Euclid's ''Elements'' using a compass alone. In the second part, he includes some other specific constructions, including some related to the mathematics of the sundial. ''Euclides Danicus'' languished in obscurity, possibly caused by its choice of language, until its rediscovery in 1928 in a bookshop in Copenhagen. Until then, the Mohr–Mascheroni theorem had been credited to Lorenzo Mascheroni, who published a proof in 1797, independently of Mohr's work. Soon after the red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Mohr
Jørgen Mohr (Latinised ''Georg(ius) Mohr''; 1 April 1640 – 26 January 1697) was a Danish mathematician, known for being the first to prove the Mohr–Mascheroni theorem, which states that any geometric construction which can be done with compass and straightedge can also be done with compasses alone. Biography Mohr was born in Copenhagen, the son of a tradesman named David Mohrendal. Beginning in 1662 he traveled to the Netherlands, to study mathematics with Christiaan Huygens.. In 1672 he published his first book, '' Euclides Danicus'', simultaneously in Copenhagen and Amsterdam, in Danish and Dutch respectively. This book, proving the Mohr–Mascheroni theorem 125 years earlier than Lorenzo Mascheroni, would languish in obscurity until its rediscovery in 1928.. Mohr served in Franco-Dutch War in 1672–1673, and was taken prisoner by the French. By 1673, he had published his second book, ''Compendium Euclidis Curiosi''. A third book was later mentioned by Mohr's son; for man ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ehrenfried Walther Von Tschirnhaus
Ehrenfried Walther von Tschirnhaus (or Tschirnhauß, ; 10 April 1651 – 11 October 1708) was a German mathematician, physicist, physician, and philosopher. He introduced the Tschirnhaus transformation and is considered by some to have been the inventor of European porcelain, an invention long accredited to Johann Friedrich Böttger but others claim porcelain had been made by English manufacturers at an even earlier date. Biography Von Tschirnhaus was born in Kieslingswalde (now Sławnikowice in western Poland) and died in Dresden, Saxony. Education Von Tschirnhaus attended the Gymnasium at Görlitz. Thereafter he studied mathematics, philosophy, and medicineSee Jacob Adler, "The Education of Ehrenfried Walther von Tschirnhaus (1651–1708)," ''Journal of Medical Biography'' 23(1) (2015): 27-35 at the University of Leiden. He traveled considerably in France, Italy, and Switzerland, and served in the army of Holland (1672–1673). During his travels he met Baruch de Sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1640 Births
Year 164 ( CLXIV) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Macrinus and Celsus (or, less frequently, year 917 ''Ab urbe condita''). The denomination 164 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Emperor Marcus Aurelius gives his daughter Lucilla in marriage to his co-emperor Lucius Verus. * Avidius Cassius, one of Lucius Verus' generals, crosses the Euphrates and invades Parthia. * Ctesiphon is captured by the Romans, but returns to the Parthians after the end of the war. * The Antonine Wall in Scotland is abandoned by the Romans. * Seleucia on the Tigris is destroyed. Births * Bruttia Crispina, Roman empress (d. 191) * Ge Xuan (or Xiaoxian), Chinese Taoist (d. 244) * Yu Fan Yu Fan (, , ; 164–233), courte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Mathematical Olympiad
The International Mathematical Olympiad (IMO) is a mathematical olympiad for pre-university students, and is the oldest of the International Science Olympiads. The first IMO was held in Romania in 1959. It has since been held annually, except in 1980. More than 100 countries, representing over 90% of the world's population, send teams of up to six students, plus one team leader, one deputy leader, and observers. The content ranges from extremely difficult algebra and pre-calculus problems to problems on branches of mathematics not conventionally covered in secondary or high school and often not at university level either, such as projective and complex geometry, functional equations, combinatorics, and well-grounded number theory, of which extensive knowledge of theorems is required. Calculus, though allowed in solutions, is never required, as there is a principle that anyone with a basic understanding of mathematics should understand the problems, even if the solutions require ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Georg Mohr Competition
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Georg may refer to: * ''Georg'' (film), 1997 *Georg (musical), Estonian musical * Georg (given name) * Georg (surname) * , a Kriegsmarine coastal tanker See also * George (other) George may refer to: People * George (given name) * George (surname) * George (singer), American-Canadian singer George Nozuka, known by the mononym George * George Washington, First President of the United States * George W. Bush, 43rd President ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Görlitz
Görlitz (; pl, Zgorzelec, hsb, Zhorjelc, cz, Zhořelec, :de:Ostlausitzer Mundart, East Lusatian dialect: ''Gerlz'', ''Gerltz'', ''Gerltsch'') is a town in the Germany, German state of Saxony. It is located on the Lusatian Neisse River, and is the largest town in Upper Lusatia as well as the second-largest town in the region of Lusatia, after Cottbus. Görlitz is the easternmost town in Germany (easternmost village is Zentendorf, Zentendorf (Šćeńc)), and lies opposite the Poland, Polish town of Zgorzelec, which was the eastern part of Görlitz until 1945. The town has approximately 56,000 inhabitants, which make Görlitz the List of cities in Saxony by population, sixth-largest town in Saxony. It is the seat of the Görlitz (district), district of Görlitz. Together with Zgorzelec, it forms the Euro City of Görlitz/Zgorzelec, which has a combined population of around 86,000. While not Sorbian languages, Lusatiophone itself, the town is situated just east of the Sorbian la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sławnikowice, Lower Silesian Voivodeship
Sławnikowice (german: Kieslingswalde, ) is a village in the administrative district of Gmina Zgorzelec, within Zgorzelec County, Lower Silesian Voivodeship, in south-western Poland, close to the German border. Geography The ''Waldhufendorf'' is located in the Polish part of the Upper Lusatia historical region, approximately east of Zgorzelec and west of the regional capital Wrocław. The A4 autostrada (European route E40) runs about north of the village. History ''Keselingswalde'' was first mentioned in a 1301 deed; with Lusatia it passed from the Bohemian Crown to the Electorate of Saxony upon the 1635 Peace of Prague and by resolution of the Vienna Congress was ceded to the Prussian province of Silesia in 1816. The manor was held by the noble Tschirnhaus dynasty from 1483 onwards, residing here until 1714. Afterwards, the estates changed hands several times, they were finally acquired by the Witzleben dynasty in 1862. Following World War II east of the Oder-Neisse li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isis (journal)
''Isis'' is a quarterly peer-reviewed academic journal published by the University of Chicago Press. It covers the history of science, history of medicine, and the history of technology, as well as their cultural influences. It contains original research articles and extensive book reviews and review essays. Furthermore, sections devoted to one particular topic are published in each issue in open access. These sections consist of the Focus section, the Viewpoint section and the Second Look section. History The journal was established by George Sarton and the first issue appeared in March 1913. Contributions were originally in any of four European languages (English, French, German, and Italian), but since the 1920s, only English has been used. Publication is partly supported by an endowment from the Dibner Fund. Two associated publications are ''Osiris'' (established 1936 by Sarton) and the ''Isis Current Bibliography''. The publication of the journal was interrupted in 1914 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dresden
Dresden (, ; Upper Saxon: ''Dräsdn''; wen, label=Upper Sorbian, Drježdźany) is the capital city of the German state of Saxony and its second most populous city, after Leipzig. It is the 12th most populous city of Germany, the fourth largest by area (after Berlin, Hamburg and Cologne), and the third most populous city in the area of former East Germany, after Berlin and Leipzig. Dresden's urban area comprises the towns of Freital, Pirna, Radebeul, Meissen, Coswig, Radeberg and Heidenau and has around 790,000 inhabitants. The Dresden metropolitan area has approximately 1.34 million inhabitants. Dresden is the second largest city on the River Elbe after Hamburg. Most of the city's population lives in the Elbe Valley, but a large, albeit very sparsely populated area of the city east of the Elbe lies in the West Lusatian Hill Country and Uplands (the westernmost part of the Sudetes) and thus in Lusatia. Many boroughs west of the Elbe lie in the foreland of the Ore Mounta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christian V
Christian V (15 April 1646 25 August 1699) was king of Denmark and Norway from 1670 until his death in 1699. Well-regarded by the common people, he was the first king anointed at Frederiksborg Castle chapel as absolute monarch since the decree that institutionalized the supremacy of the king in Denmark-Norway. Christian fortified the absolutist system against the aristocracy by accelerating his father's practice of allowing both Holstein nobles and Danish and Norwegian commoners into state service. As king, he wanted to show his power as absolute monarch through architecture, and dreamed of a Danish Versailles. He was the first to use the 1671 Throne Chair of Denmark, partly made for this purpose. His motto was: ''Pietate et Justitia'' (With piety and justice). Biography Early years Prince Christian was born on 15 April 1646 at Duborg Castle in the city of Flensburg, then located in the Duchy of Schleswig. He was the first legitimate child born to the then Prince Frederi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Collins (mathematician)
John Collins FRS (25 March 1625 – 10 November 1683) was an English mathematician. He is most known for his extensive correspondence with leading scientists and mathematicians such as Giovanni Alfonso Borelli, Gottfried Leibniz, Isaac Newton, and John Wallis. His correspondence provides details of many of the discoveries and developments made in his time, and shows his activity as an 'intelligencer'. Life He was the son of a nonconformist minister, and was born at Wood Eaton in Oxfordshire, 5 March 1625. Apprenticed at the age of sixteen to Thomas Allam, a bookseller, living outside the Turl Gate of Oxford, he was driven to quit the trade by the troubles of the time, and accepted a clerkship in the employment of John Marr, clerk of the kitchen to the Prince of Wales. From him he derived some instruction in mathematics, but the outbreak of the First English Civil War drove him to sea for seven years, 1642-9, most of which time he spent on board an English merchantman, engaged b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
