|
Alain Chenciner
Alain Chenciner (born 23 October 1943, in Villeneuve-sur-Lot) is a French mathematician, specializing in dynamical systems with applications to celestial mechanics. Chenciner studied from 1963 to 1965 at the École polytechnique and did research from 1966 for CNRS (Attachée de Recherche) at the École Polytechnique (at the Centre de Mathématiques founded by Laurent Schwartz). In 1971 he received his Ph.D. from the University of Paris XI under Jean Cerf with thesis ''Sur la géométrie des strates de petites codimensions de l'espace des fonctions différentiables réelles sur une variété'' (Chenciner's thesis defense involved Henri Cartan, Laurent Schwartz and René Thom). Chenciner became a ''maître de conférences'' at the University of Paris XI, then in 1973 at the University of Paris VII, and in 1975 at the University of Nice. He returned in 1978 as ''maître de conférences'' to the University of Paris VII, where in 1981 he became professor extraordinarius (''professeur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Villeneuve-sur-Lot
Villeneuve-sur-Lot (; in the Languedocien dialect of Occitan language: ''Vilanuèva d'Òlt'' ) is a town and commune in the southwestern French department of Lot-et-Garonne. The commune was formerly named ''Villeneuve-d'Agen''. Villeneuve-sur-Lot is located 22 km northeast of the commune of Agen and straddles the river Lot. History Villeneuve was founded in 1254 by Alphonse, Count of Poitiers, brother of Louis IX, on the site of the town of Gajac, which had been deserted during the Albigensian Crusade. By the early 20th century, Villeneuve-sur-Lot was an important agricultural centre and had a large trade in plums (''prunes d'ente''); the preparation of preserved plums and the tinning of peas and beans were major industries. The important mill of Gajac stood on the bank of the Lot a little above the town. Population Sights The main quarter of the town is located on the right bank of the Lot River and is linked to the quarter on the left bank by a bridge from the 13th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques Laskar
Jacques Laskar (born 28 April 1955 in Paris) is a French astronomer. He is a research director at the French National Centre for Scientific Research (CNRS), and a member of ''Astronomy and dynamical systems'' of the Institute of Celestial Mechanics and Computation of Ephemerides (French: IMCCE) of the Paris Observatory. He received the CNRS Silver Medal in 1994 and the Milutin Milankovic Medal in 2019. Since 2003, he is a member of the French Academy of Sciences. Education and early teaching career After attending the École Normale Supérieure de Cachan, Jacques Laskar taught secondary school from 1977 to 1980 and passed the aggregation in mathematics in 1981. He then studied astronomy and celestial mechanics, finishing his thesis in 1984. He became a CNRS researcher at the Bureau des Longitudes in 1985. Research work Stability of the Solar System In 1989, Laskar provided evidence that the Solar System is chaotic instead of quasi-periodic as originally determined by Lapl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
21st-century French Mathematicians
The 1st century was the century spanning AD 1 ( I) through AD 100 ( C) according to the Julian calendar. It is often written as the or to distinguish it from the 1st century BC (or BCE) which preceded it. The 1st century is considered part of the Classical era, epoch, or historical period. The 1st century also saw the appearance of Christianity. During this period, Europe, North Africa and the Near East fell under increasing domination by the Roman Empire, which continued expanding, most notably conquering Britain under the emperor Claudius ( AD 43). The reforms introduced by Augustus during his long reign stabilized the empire after the turmoil of the previous century's civil wars. Later in the century the Julio-Claudian dynasty, which had been founded by Augustus, came to an end with the suicide of Nero in AD 68. There followed the famous Year of Four Emperors, a brief period of civil war and instability, which was finally brought to an end by Vespasian, ninth Roman emper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Living People
Related categories * :Year of birth missing (living people) / :Year of birth unknown * :Date of birth missing (living people) / :Date of birth unknown * :Place of birth missing (living people) / :Place of birth unknown * :Year of death missing / :Year of death unknown * :Date of death missing / :Date of death unknown * :Place of death missing / :Place of death unknown * :Missing middle or first names See also * :Dead people * :Template:L, which generates this category or death years, and birth year and sort keys. : {{DEFAULTSORT:Living people 21st-century people People by status ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1943 Births
Events Below, the events of World War II have the "WWII" prefix. January * January 1 – WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed and 137,650 captured. * January 4 – WWII: Greek-Polish athlete and saboteur Jerzy Iwanow-Szajnowicz is executed by the Germans at Kaisariani. * January 11 ** The United States and United Kingdom revise previously unequal treaty relationships with the Republic of China (1912–1949), Republic of China. ** Italian-American anarchist Carlo Tresca is assassinated in New York City. * January 13 – Anti-Nazi protests in Sofia result in 200 arrests and 36 executions. * January 14 – January 24, 24 – WWII: Casablanca Conference: Franklin D. Roosevelt, President of the United States; Winston Churchill, Prime Minister of the United Kingdom; and Generals Charles de Gaulle and Henri Giraud of the Free French forces meet secretly at the Anfa Hotel in Casablanca, Morocco, to plan the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Saari
Donald Gene Saari (born March 1940) is an American mathematician, a Distinguished Professor of Mathematics and Economics and former director of the Institute for Mathematical Behavioral Sciences at the University of California, Irvine. His research interests include the -body problem, the Borda count voting system, and application of mathematics to the social sciences. Contributions Saari has been widely quoted as an expert in voting methods and lottery odds. He is opposed to the use of the Condorcet criterion in evaluating voting systems, and among positional voting schemes he favors using the Borda count over plurality voting, because it reduces the frequency of paradoxical outcomes (which however cannot be avoided entirely in ranking systems because of Arrow's impossibility theorem). For instance, as he has pointed out, plurality voting can lead to situations where the election outcome would remain unchanged if all voters' preferences were reversed; this cannot happen with th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Bennequin
Daniel Bennequin (3 January 1952) is a French mathematician, known for the Thurston–Bennequin number (sometimes called the Bennequin number) introduced in his doctoral dissertation. Education and career Bennequin completed his secondary education at Lycée Condorcet and then graduated from the École normale supérieure. He received his habilitation (Doctoral d'Etat) in 1982 from the University of Paris VII under Alain Chenciner with thesis ''Entrelacements et équations de Pfaff''. He was a professor at the University of Strasbourg before becoming a professor at the University of Paris VII (Institut Mathématique de Jussieu). Bennequin's dissertation was a major contribution to contact geometry, in which he gave the first example of an exotic contact structure embedded in Euclidean 3-space. On the basis of their work in the 1980s Bennequin and Yakov Eliashberg might be considered the founders of contact topology. Bennequin also works on motion planning Motion planning, als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantico
''Atlantico'' is a French news website. Founded on 28 February 2011 amid much media attention, it quickly attracted notice for scoops related to scandals involving the Socialist politician and International Monetary Fund head, Dominique Strauss-Kahn. History The website is inspired by the American websites ''The Huffington Post'' and ''The Daily Beast''. It characterises its editorial position as " lassicalliberal and independent", while other French media have associated it with the right wing of the French political spectrum, a label rejected by ''Atlantico''. 51% of ''Atlanticos stock of one million euro is held by its founders, the journalists , , Loïc Rouvin and Igor Daguier; and the remaining 49% by "Free Minds", a group of investors that includes Arnaud Dassier, a former campaign adviser to President Nicolas Sarkozy. As of 2011, the site does not charge for access and is financed through advertisements. Its staff of about ten journalists also includes Gilles Klein, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institut Henri-Poincaré
An institute is an organisational body created for a certain purpose. They are often research organisations (research institutes) created to do research on specific topics, or can also be a professional body. In some countries, institutes can be part of a university or other institutions of higher education, either as a group of departments or an autonomous educational institution without a traditional university status such as a "university institute" (see Institute of Technology). In some countries, such as South Korea and India, private schools are sometimes referred to as institutes, and in Spain, secondary schools are referred to as institutes. Historically, in some countries institutes were educational units imparting vocational training and often incorporating libraries, also known as mechanics' institutes. The word "institute" comes from a Latin word ''institutum'' meaning "facility" or "habit"; from ''instituere'' meaning "build", "create", "raise" or "educate". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Poincaré
Jules Henri Poincaré ( S: stress final syllable ; 29 April 1854 – 17 July 1912) was a French mathematician, theoretical physicist, engineer, and philosopher of science. He is often described as a polymath, and in mathematics as "The Last Universalist", since he excelled in all fields of the discipline as it existed during his lifetime. As a mathematician and physicist, he made many original fundamental contributions to pure and applied mathematics, mathematical physics, and celestial mechanics. In his research on the three-body problem, Poincaré became the first person to discover a chaotic deterministic system which laid the foundations of modern chaos theory. He is also considered to be one of the founders of the field of topology. Poincaré made clear the importance of paying attention to the invariance of laws of physics under different transformations, and was the first to present the Lorentz transformations in their modern symmetrical form. Poincaré discove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cimetière Du Montparnasse
Montparnasse Cemetery (french: link=no, Cimetière du Montparnasse) is a cemetery in the Montparnasse quarter of Paris, in the city's 14th arrondissement. The cemetery is roughly 47 acres and is the second largest cemetery in Paris. The cemetery has over 35,000 graves and approximately a thousand people are buried here each year. The cemetery contains 35,000 plots and is the resting place to a variety of individuals including political figures, philosophers, artists, actors, and writers. Additionally, in the cemetery one can find a number of tombs commemorating those who died in the Franco-Prussian war during the siege of Paris (1870–1871) and the Paris Commune (1871). History The cemetery was created at the beginning of the 19th century in the southern part of the city. At the same time there were cemeteries outside the city limits: Passy Cemetery to the west, Montmartre Cemetery to the north, and Père Lachaise Cemetery to the east. In the 16th century the intersecting road ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
