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Girard Desargues
Girard Desargues (; 21 February 1591September 1661) was a French mathematician and engineer, who is considered one of the founders of projective geometry. Desargues' theorem, the Desargues graph, and the crater Desargues on the Moon are named in his honour. Biography Born in Lyon, Desargues came from a family devoted to service to the French crown. His father was a royal notary, an investigating commissioner of the Seneschal's court in Lyon (1574), the collector of the tithes on ecclesiastical revenues for the city of Lyon (1583) and for the diocese of Lyon. Girard Desargues worked as an architect from 1645. Prior to that, he had worked as a tutor and may have served as an engineer and technical consultant in the entourage of Richelieu. Yet his involvement in the Siege of La Rochelle, though alleged by Ch. Weiss in ''Biographie Universelle'' (1842), has never been testified. As an architect, Desargues planned several private and public buildings in Paris and Lyon. As an e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyon
Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, northeast of Saint-Étienne. The City of Lyon is the List of communes in France with over 20,000 inhabitants, third-largest city in France with a population of 522,250 at the Jan. 2021 census within its small municipal territory of , but together with its suburbs and exurbs the Lyon Functional area (France), metropolitan area had a population of 2,308,818 that same year, the second largest in France. Lyon and 58 suburban municipalities have formed since 2015 the Lyon Metropolis, Metropolis of Lyon, a directly elected metropolitan authority now in charge of most urban issues, with a population of 1,424,069 in 2021. Lyon is the Prefectures in France, prefecture of the Auvergne-Rhône-Alpes Regions of France, region and seat of the Departmental co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epicycloid
In geometry, an epicycloid (also called hypercycloid) is a plane curve produced by tracing the path of a chosen point on the circumference of a circle—called an ''epicycle''—which rolls without slipping around a fixed circle. It is a particular kind of roulette. An epicycloid with a minor radius (R2) of 0 is a circle. This is a degenerate form. Equations If the rolling circle has radius r, and the fixed circle has radius R = kr, then the parametric equations for the curve can be given by either: :\begin & x (\theta) = (R + r) \cos \theta \ - r \cos \left( \frac \theta \right) \\ & y (\theta) = (R + r) \sin \theta \ - r \sin \left( \frac \theta \right) \end or: :\begin & x (\theta) = r (k + 1) \cos \theta - r \cos \left( (k + 1) \theta \right) \\ & y (\theta) = r (k + 1) \sin \theta - r \sin \left( (k + 1) \theta \right). \end This can be written in a more concise form using complex numbers as :z(\theta) = r \left( (k + 1)e^ - e^ \right) where * the angle \theta \in , 2\ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1591 Births
Events January–March * January 27 – Scottish schoolmaster John Fian becomes the first person to be executed after the North Berwick witch trials, following his conviction for the crime of witchcraft. Fian is taken to the Castlehill outside of Edinburgh and strangled after which his body is burned. Agnes Sampson is garroted the next day at Castlehill and then burned. * February 7 – Pope Gregory XIV, who had succeeded Pope Urban VII in December, appoints Cardinal Marco Antonio Colonna and six other cardinals to a commission to revise the Sixtine Vulgate Latin translation of the Bible, published in 1590 under the editorship of Pope Sixtus V, to which the College of Cardinals has taken exception. The revision of the revision, dubbed the Sixto-Clementine Vulgate, will be completed in 1592 and be the official version used by the Catholic Church until 1979. * February 25 – Poet Edmund Spenser is granted an annual pension of 50 pounds sterling by Que ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
René Taton
René Taton (4 April 1915 – 9 August 2004) was a French mathematician, historian of science, and long co-chief-editor of the ''Revue d'histoire des sciences''. He was awarded both the highest lifetime achievement awards in the field of history of science: the George Sarton Medal, in 1975, and the Alexandre Koyré Medal, in 1997. Life Taton was born on 4 April 1915 in L'Échelle, France. In 1935, he became a student of École normale supérieure de Saint-Cloud. He was a mathematician before moving to the history of science, and in 1951 cemented the move by earning a ''doctorat d'état ès lettres'' with philosopher Gaston Bachelard as his advisor, focusing on the history of projective geometry; his primary thesis concerned the work of Gaspard Monge and his accessory thesis concerned Girard Desargues. He died on 9 August 2004 in Ajaccio, Corsica, France. Career Taton was an early participant in Alexandre Koyré's Centre de Recherches en Histoire des Sciences et des Tech ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer-Verlag
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second-largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationally, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeremy Gray
Jeremy John Gray (born 25 April 1947) is an English mathematician primarily interested in the history of mathematics. Biography Gray studied mathematics at the University of Oxford from 1966 to 1969, and then at Warwick University, obtaining his PhD in 1980 under the supervision of Ian Stewart and David Fowler. He has worked at the Open University since 1974, and became a lecturer there in 1978. He also lectured at the University of Warwick from 2002 to 2017, teaching a course on the history of mathematics. Gray was a consultant on the television series, '' The Story of Maths'',''To Infinity and Beyond'' 27 October 2008 21:00 BBC Four a co-production between the Open University and the BBC. He edits Archive for History of Exact Sciences. In 1998 he was an Invited Speaker of the International Congress of Mathematicians in Berlin. In 2012 he became a fellow of the American Mathematical Society. Books Gray has been awarded prizes for his contributions to mathematics, includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Judith V
The Book of Judith is a deuterocanonical book included in the Septuagint and the Catholic and Eastern Orthodox Christian Old Testament of the Bible but excluded from the Hebrew canon and assigned by Protestants to the apocrypha. It tells of a Jewish widow, Judith, who uses her beauty and charm to kill an Assyrian general who has besieged her city, Bethulia. With this act, she saves nearby Jerusalem from total destruction. The name Judith (), meaning "praised" or "Jewess", is the feminine form of Judah. The surviving manuscripts of Greek translations appear to contain several historical anachronisms, which is why some Protestant scholars now consider the book ahistorical. Instead, the book is classified as a parable, theological novel, or even the first historical novel. The Roman Catholic Church formerly maintained the book's historicity, assigning its events to the reign of King Manasseh of Judah and that the names were changed in later centuries for an unknown reason. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of optical instruments, instruments that use or Photodetector, detect it. Optics usually describes the behaviour of visible light, visible, ultraviolet, and infrared light. Light is a type of electromagnetic radiation, and other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the Classical electromagnetism, classical electromagnetic description of light, however complete electromagnetic descriptions of light are often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of Ray (optics), rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perspective (visual)
Linear or point-projection perspective () is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. Linear perspective is an approximate representation, generally on a flat surface, of an image as it is seen by the eye. Perspective drawing is useful for representing a three-dimensional scene in a two-dimensional medium, like paper. It is based on the optical fact that for a person an object looks N times (linearly) smaller if it has been moved N times further from the eye than the original distance was. The most characteristic features of linear perspective are that objects appear smaller as their distance from the observer increases, and that they are subject to , meaning that an object's dimensions parallel to the line of sight appear shorter than its dimensions perpendicular to the line of sight. All objects will recede to points in the distance, usually along the horizon line, but also above and below the horizon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perspective (graphical)
Linear or point-projection perspective () is one of two types of graphical projection perspective in the graphic arts; the other is parallel projection. Linear perspective is an approximate representation, generally on a flat surface, of an image as it is seen by the eye. Perspective drawing is useful for representing a three-dimensional scene in a two-dimensional medium, like paper. It is based on the optical fact that for a person an object looks N times (linearly) smaller if it has been moved N times further from the eye than the original distance was. The most characteristic features of linear perspective are that objects appear smaller as their distance from the observer increases, and that they are subject to , meaning that an object's dimensions parallel to the line of sight appear shorter than its dimensions perpendicular to the line of sight. All objects will recede to points in the distance, usually along the horizon line, but also above and below the horiz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Brocard
Pierre René Jean Baptiste Henri Brocard (; 12 May 1845 – 16 January 1922) was a French meteorologist and mathematician, in particular a geometer. His best-known achievement is the invention and discovery of the properties of the Brocard points, the Brocard circle, and the Brocard triangle, all bearing his name. Contemporary mathematician Nathan Court wrote that he, along with Émile Lemoine and Joseph Neuberg, was one of the three co-founders of modern triangle geometry. He was awarded the Ordre des Palmes Académiques, and was an officer of the Légion d'honneur. He spent most of his life studying meteorology as an officer in the French Navy, but seems to have made no notable original contributions to the subject. Biography Early years Pierre René Jean Baptiste Henri Brocard was born on 12 May 1845, in Vignot, Meuse to Elizabeth Auguste Liouville and Jean Sebastien Brocard. He attended the Lycée in Marseille as a young child, and then the Lycée in Strasbour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashgate Publishing
Ashgate Publishing was an academic book and journal publisher based in Farnham (Surrey, United Kingdom). It was established in 1967 and specialised in the social sciences, arts, humanities and professional practice. It had an American office in Burlington, Vermont, and another British office in London. It is now a subsidiary of Informa (Taylor & Francis). The company had several imprints including Gower Publishing which published professional business and management titles; Lund Humphries, originally established in 1939, which published illustrated art books, particularly in the field of modern British art; and Dartmouth. In March 2015, Gower unveiled GpmFirst, a web-based community of practice allowing subscribers access to more than 120 project management titles, as well as discussions and articles relevant to business and project management. In July 2015, it was announced that Ashgate had been sold to Informa for a reported £20M, and Lund Humphries was relaunched, as an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
