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Karl F. Sundman
Karl Frithiof Sundman (28 October 1873, in Kaskinen – 28 September 1949, in Helsinki) was a Finnish mathematician who used analytic methods to prove the existence of a convergent infinite series solution to the three-body problem in two papers published in 1907 and 1909. His results gained fame when they were reproduced in '' Acta Mathematica'' in 1912. He also published a paper on regularization methods in mechanics in 1912. Awards, recognition Sundman was awarded the Pontécoulant prize by the French Academy of Science in 1913 for this work. In 1908 Sundman was elected member of the Finnish Society of Sciences and Letters and in 1947 foreign member of the Royal Swedish Academy of Sciences. The crater Sundman on the Moon is named after him, as is the asteroid 1424 Sundmania. See also *Qiudong Wang Qiudong Wang is a professor at the Department of Mathematics, the University of Arizona. In 1982 he received a B.S. at Nanjing University and in 1994 a Ph.D. at the University ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Sundman
Karl Frithiof Sundman (28 October 1873, in Kaskinen – 28 September 1949, in Helsinki) was a Finland, Finnish mathematician who used analytic methods to prove the existence of a convergent infinite series solution to the N-body problem#Three-body problem, three-body problem in two papers published in 1907 and 1909. His results gained fame when they were reproduced in ''Acta Mathematica'' in 1912. He also published a paper on regularization (physics), regularization methods in mechanics in 1912. Awards, recognition Sundman was awarded the Pontécoulant prize by the French Academy of Science in 1913 for this work. In 1908 Sundman was elected member of the Finnish Society of Sciences and Letters and in 1947 foreign member of the Royal Swedish Academy of Sciences. The crater Sundman (crater), Sundman on the Moon is named after him, as is the asteroid 1424 Sundmania. See also *Qiudong Wang generalized Sundman's solution to the case of more than three bodies In the 1990s.. Reference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finnish Society Of Sciences And Letters
The Finnish Society of Sciences and Letters is a Finnish academy for natural sciences, social sciences and humanities. It is known in Latin as Societas Scientiarum Fennica, in Swedish as Finska Vetenskaps-Societeten, and in Finnish as Suomen Tiedeseura. It is a bilingual (Swedish and Finnish) science academy and the oldest of the four science academies in Finland. The society was founded in 1838 and is based in Helsinki. It has a total of 120 full ordinary Finnish members, excluding members who have reached the age of 67 (a member who reaches the age of 67 retains the rights as a member but leaves his or her chair open for election of a new member), and about 120 foreign members. It is divided into four sections: I: mathematics and physics, II: biosciences, III: humanities, and IV: social sciences. The society publishes a yearbook, ''Sphinx'', and the book series ''Commentationes Humanarum Litterarum'', ''Commentationes Scientiarum Socialium'', ''Bidrag till kännedom av Finlands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1949 Deaths
Events January * January 1 – A United Nations-sponsored ceasefire brings an end to the Indo-Pakistani War of 1947. The war results in a stalemate and the division of Kashmir, which still continues as of 2022. * January 2 – Luis Muñoz Marín becomes the first democratically elected Governor of Puerto Rico. * January 11 – The first "networked" television broadcasts take place, as KDKA-TV in Pittsburgh, Pennsylvania goes on the air, connecting east coast and mid-west programming in the United States. * January 16 – Şemsettin Günaltay forms the new government of Turkey. It is the 18th government, last single party government of the Republican People's Party. * January 17 – The first VW Type 1 to arrive in the United States, a 1948 model, is brought to New York by Dutch businessman Ben Pon. Unable to interest dealers or importers in the Volkswagen, Pon sells the sample car to pay his travel expenses. Only two 1949 models are sold in Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1873 Births
Events January–March * January 1 ** Japan adopts the Gregorian calendar. ** The California Penal Code goes into effect. * January 17 – American Indian Wars: Modoc War: First Battle of the Stronghold – Modoc Indians defeat the United States Army. * February 11 – The Spanish Cortes deposes King Amadeus I, and proclaims the First Spanish Republic. * February 12 ** Emilio Castelar, the former foreign minister, becomes prime minister of the new Spanish Republic. ** The Coinage Act of 1873 in the United States is signed into law by President Ulysses S. Grant; coming into effect on April 1, it ends bimetallism in the U.S., and places the country on the gold standard. * February 20 ** The University of California opens its first medical school in San Francisco. ** British naval officer John Moresby discovers the site of Port Moresby, and claims the land for Britain. * March 3 – Censorship: The United States Congress enacts the Comstock La ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qiudong Wang
Qiudong Wang is a professor at the Department of Mathematics, the University of Arizona. In 1982 he received a B.S. at Nanjing University and in 1994 a Ph.D. at the University of Cincinnati. Wang is best known for his 1991 paper ''The global solution of the n-body problem In physics, the -body problem is the problem of predicting the individual motions of a group of celestial objects interacting with each other gravitationally.Leimanis and Minorsky: Our interest is with Leimanis, who first discusses some histor ...'', in which he generalised Karl F. Sundman's results from 1912 to a system of more than three bodies. However, L. K. Babadzanjanz claims to have made the same generalization earlier, in 1979.. References {{DEFAULTSORT:Wang, Qiudong Chinese emigrants to the United States Nanjing University alumni University of Cincinnati alumni University of Arizona faculty American astronomers Living people Year of birth missing (living people) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1424 Sundmania
1424 Sundmania ( ''prov. designation'': ) is a large asteroid and rather slow rotator from the background population of the outer regions of the asteroid belt. It was discovered on 9 January 1937, by astronomer Yrjö Väisälä at the Turku Observatory in southwest Finland. The dark X-type asteroid has a notably long rotation period of 93.7 hours and measures approximately in diameter. It was named after Finnish astronomer and mathematician Karl F. Sundman. Orbit and classification ''Sundmania'' is a non-family asteroid of the main belt's background population when applying the hierarchical clustering method to its proper orbital elements. It orbits the Sun in the outer main-belt at a distance of 3.0–3.4 AU once every 5 years and 8 months (2,081 days). Its orbit has an eccentricity of 0.06 and an inclination of 9 ° with respect to the ecliptic. The body's observation arc begins with its first identification as at Heidelberg Observatory in November 1918, more th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of Australia). The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's at , with Jupiter's moon Io being the only satellite in the Solar System known to have a higher surface gravity and density. The Moon orbits Earth at an average distance of , or about 30 times Earth's diameter. Its gravitational influence is the main driver of Earth's tides and very slowly lengthens Earth's day. The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundman (crater)
Sundman is a lunar impact crater that lies just past the western limb of the Moon. Although it lies on the far side from the Earth, this part of the surface is brought into view during periods of favorable libration and illumination. Sundman lies to the southwest of the walled plain Einstein, and to the west of the Vallis Bohr cleft. It was named after Finnish mathematician and astronomer Karl F. Sundman. Description This crater lies in the midst of the skirt of ejecta that surrounds the Mare Orientale impact basin. Both the crater and its surroundings have been modified by this enormous amount of material, and the surface displays an uneven pattern that is generally radial to the basin, which is located to the north. The crater forms a shallow depression in the surface, with small craters along the southeastern and southwestern rim. Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is clos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Swedish Academy Of Sciences
The Royal Swedish Academy of Sciences ( sv, Kungliga Vetenskapsakademien) is one of the royal academies of Sweden. Founded on 2 June 1739, it is an independent, non-governmental scientific organization that takes special responsibility for promoting natural sciences and mathematics and strengthening their influence in society, whilst endeavouring to promote the exchange of ideas between various disciplines. The goals of the academy are: * to be a forum where researchers meet across subject boundaries, * to offer a unique environment for research, * to provide support to younger researchers, * to reward outstanding research efforts, * to communicate internationally among scientists, * to advance the case for science within society and to influence research policy priorities * to stimulate interest in mathematics and science in school, and * to disseminate and popularize scientific information in various forms. Every year, the academy awards the Nobel Prizes in physics and chemis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Academy Of Science
The French Academy of Sciences (French: ''Académie des sciences'') is a learned society, founded in 1666 by Louis XIV at the suggestion of Jean-Baptiste Colbert, to encourage and protect the spirit of French scientific research. It was at the forefront of scientific developments in Europe in the 17th and 18th centuries, and is one of the earliest Academies of Sciences. Currently headed by Patrick Flandrin (President of the Academy), it is one of the five Academies of the Institut de France. History The Academy of Sciences traces its origin to Colbert's plan to create a general academy. He chose a small group of scholars who met on 22 December 1666 in the King's library, near the present-day Bibliothèque Nationals, and thereafter held twice-weekly working meetings there in the two rooms assigned to the group. The first 30 years of the Academy's existence were relatively informal, since no statutes had as yet been laid down for the institution. In contrast to its Br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaskinen
Kaskinen (; sv, Kaskö) is a town, municipality and island of Finland. It is located in the province of Western Finland and is part of the Ostrobothnia region. The population of Kaskinen is () and the municipality covers an area of (excluding sea areas) of which is inland water (). The population density is . The population is bilingual with a majority speaking Finnish () and the minority Swedish (). Kaskinen is the smallest municipality in Finland with a town statusHeidi Sommar: ''Kaskinen ei kasvanutkaan metropoliksi vaan puutaloidylliksi''. '' YLE'', April 17, 2015. (in Finnish) The town is located on an island with two bridges to the mainland, and its only border neighbor is the town of Närpes. The townscape of Kaskinen consists of uniform wooden construction. Even though it is planned mainly as a port town, the also runs from the town to the to Seinäjoki. Today, however, the railway is only used for freight traffic, mainly for the Port of Kaskinen. The paddle appe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanics
Mechanics (from Ancient Greek: μηχανική, ''mēkhanikḗ'', "of machines") is the area of mathematics and physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objects result in displacements, or changes of an object's position relative to its environment. Theoretical expositions of this branch of physics has its origins in Ancient Greece, for instance, in the writings of Aristotle and Archimedes (see History of classical mechanics and Timeline of classical mechanics). During the early modern period, scientists such as Galileo, Kepler, Huygens, and Newton laid the foundation for what is now known as classical mechanics. As a branch of classical physics, mechanics deals with bodies that are either at rest or are moving with velocities significantly less than the speed of light. It can also be defined as the physical science that deals with the motion of and forces on bodies not in the quantum r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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