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Tan Lei
Tan Lei (; 1963–2016) was a mathematician specialising in complex dynamics and functions of complex numbers. She is most well-known for her contributions to the study of the Mandelbrot set and Julia set. Career After gaining her PhD in Mathematics in 1986 at University of Paris-Sud, Orsay, Tan worked as an assistant researcher in Geneva. She then conducted postdoctoral projects at the Max Planck Institute for Mathematics and University of Bremen until 1989, when she was made a lecturer at Ecole Normale Superieure de Lyon in France. Tan held a research position at University of Warwick from 1995 to 1999, before becoming a senior lecturer at Cergy-Pontoise University. She was made professor at University of Angers in 2009. Mathematical work Tan obtained important results about the Julia and Mandelbrot sets, in particular investigating their fractality and the similarities between the two.''Local properties of The Mandelbrot set M, Similarity between M and Julia sets'', Proc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tan (surname)
Tan is a common Chinese surname wikt:譚, 譚.''China Renews Top 100 Surnames, Li Still the Biggest'' ''People's Daily'' online (English), 11 January 2006 It is considered the 56th most common surname. Origin Two origins have been suggested for the Tan surname: * The surname came from the ancient Tan (Shandong), State of Tan which was located in the western part of what is now Shandong Province. During the Spring and Autumn period, this state was conquered by the neighbouring Qi (state), State of Qi. The court changed their surname to Tan in remembrance of their defeated homeland, and later prospered in Hunan Province. * The surname came from the less common surname 談, another with the same pronunciation in Mandarin Chinese and Cantonese Chinese. In or ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geneva
Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevra ; rm, Genevra is the List of cities in Switzerland, second-most populous city in Switzerland (after Zürich) and the most populous city of Romandy, the French-speaking part of Switzerland. Situated in the south west of the country, where the Rhône exits Lake Geneva, it is the capital of the Canton of Geneva, Republic and Canton of Geneva. The city of Geneva () had a population 201,818 in 2019 (Jan. estimate) within its small municipal territory of , but the Canton of Geneva (the city and its closest Swiss suburbs and exurbs) had a population of 499,480 (Jan. 2019 estimate) over , and together with the suburbs and exurbs located in the canton of Vaud and in the French Departments of France, departments of Ain and Haute-Savoie the cross-border Geneva metropolitan area as officially defined by Eurostat, which extends over ,As of 2020, the Eurostat-defined Functional Urban Area of Geneva was made up of 9 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1963 Births
Events January * January 1 – Bogle–Chandler case: Commonwealth Scientific and Industrial Research Organisation scientist Dr. Gilbert Bogle and Mrs. Margaret Chandler are found dead (presumed poisoned), in bushland near the Lane Cove River, Sydney, Australia. * January 2 – Vietnam War – Battle of Ap Bac: The Viet Cong win their first major victory. * January 9 – A total penumbral lunar eclipse is visible in the Americas, Europe, Africa, and Asia, and is the 56th lunar eclipse of Lunar Saros 114. Gamma has a value of −1.01282. It occurs on the night between Wednesday, January 9 and Thursday, January 10, 1963. * January 13 – 1963 Togolese coup d'état: A military coup in Togo results in the installation of coup leader Emmanuel Bodjollé as president. * January 17 – A last quarter moon occurs between the penumbral lunar eclipse and the annular solar eclipse, only 12 hours, 29 minutes after apogee. * January 19 – Soviet spy Ghe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
China
China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and borders fourteen countries by land, the most of any country in the world, tied with Russia. Covering an area of approximately , it is the world's third largest country by total land area. The country consists of 22 provinces, five autonomous regions, four municipalities, and two Special Administrative Regions (Hong Kong and Macau). The national capital is Beijing, and the most populous city and financial center is Shanghai. Modern Chinese trace their origins to a cradle of civilization in the fertile basin of the Yellow River in the North China Plain. The semi-legendary Xia dynasty in the 21st century BCE and the well-attested Shang and Zhou dynasties developed a bureaucratic political system to serve hereditary monarchies, or dyna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beijing
} Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 million residents. It has an administrative area of , the third in the country after Guangzhou and Shanghai. It is located in Northern China, and is governed as a municipality under the direct administration of the State Council with 16 urban, suburban, and rural districts.Figures based on 2006 statistics published in 2007 National Statistical Yearbook of China and available online at archive. Retrieved 21 April 2009. Beijing is mostly surrounded by Hebei Province with the exception of neighboring Tianjin to the southeast; together, the three divisions form the Jingjinji megalopolis and the national capital region of China. Beijing is a global city and one of the world's leading centres for culture, diplomacy, politics, finance, busi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierpiński Carpet
The Sierpiński carpet is a plane fractal first described by Wacław Sierpiński in 1916. The carpet is a generalization of the Cantor set to two dimensions; another is Cantor dust. The technique of subdividing a shape into smaller copies of itself, removing one or more copies, and continuing recursively can be extended to other shapes. For instance, subdividing an equilateral triangle into four equilateral triangles, removing the middle triangle, and recursing leads to the Sierpiński triangle. In three dimensions, a similar construction based on cubes is known as the Menger sponge. Construction The construction of the Sierpiński carpet begins with a square. The square is cut into 9 congruent subsquares in a 3-by-3 grid, and the central subsquare is removed. The same procedure is then applied recursively to the remaining 8 subsquares, ''ad infinitum''. It can be realised as the set of points in the unit square whose coordinates written in base three do not both have a digit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Misiurewicz Point
In mathematics, a Misiurewicz point is a parameter value in the Mandelbrot set (the parameter space of complex quadratic maps) and also in real quadratic maps of the interval for which the critical point is strictly pre-periodic (i.e., it becomes periodic after finitely many iterations but is not periodic itself). By analogy, the term ''Misiurewicz point'' is also used for parameters in a multibrot set where the unique critical point is strictly pre-periodic. This term makes less sense for maps in greater generality that have more than one free critical point because some critical points might be periodic and others not. These points are named after the Polish-American mathematician Michał Misiurewicz, who was the first to study them. Mathematical notation A parameter c is a Misiurewicz point M_ if it satisfies the equations: :f_c^(z_) = f_c^(z_) and: :f_c^(z_) \neq f_c^(z_) so: :M_ = c : f_c^(z_) = f_c^(z_) where: * z_ is a critical point of f_c, * k and n are positive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Angers
The University of Angers (french: Université d'Angers; UA) is a public university in western France, with campuses in Angers, Cholet, and Saumur. It forms part of thAngers-Le Mans University Community History The University of Angers was initially established during the 11th century as the ''School of Angers''. It became known as the ''University of Angers'' in 1337 and was the fifth largest university in France at the time. The university existed until 1793 when all universities in France were closed. Nearly 2 centuries later, the university was reestablished in 1971 after a regrouping of several preexisting higher education establishments. It would go on to add additional campuses in Cholet and Saumur in 1987 and 2004, respectively. Today, the University of Angers counts more than 25,000 students across all campuses. Academics The University of Angers offers bachelors, vocational bachelors, masters, and doctoral degrees across its 8 faculties and institutes: *Faculty of Tou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cergy-Pontoise University
Cergy-Pontoise University (French: ''Université de Cergy-Pontoise'') was a French university, located in Cergy-Pontoise, France. On 1 January 2020, the university merged with the International School of Information Processing Sciences (EISTI) and the University of Paris-Seine to form CY Cergy Paris University. Cergy-Pontoise University is a public university and a leading centre of teaching and research, which welcomes 18,000 students and 1,500 international students interested in studying abroad. The university is located in the west of Paris (30 km from central Paris), in the Val-d'Oise department. The university also managed the Institut d'études politiques de Saint-Germain-en-Laye (in cooperation with the Versailles Saint-Quentin-en-Yvelines University). Faculties The university offers all levels of graduate and post-graduate studies. 144 bachelors, masters and doctorate degrees are available in a wide range of fields : law, economy and management, languages, litera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Warwick
The University of Warwick ( ; abbreviated as ''Warw.'' in post-nominal letters) is a public research university on the outskirts of Coventry between the West Midlands (county), West Midlands and Warwickshire, England. The university was founded in 1965 as part of a government initiative to expand higher education. The Warwick Business School was established in 1967, the Warwick Law School in 1968, WMG, University of Warwick, Warwick Manufacturing Group (WMG) in 1980, and Warwick Medical School in 2000. Warwick incorporated Coventry College of Education in 1979 and Horticulture Research International in 2004. Warwick is primarily based on a campus on the outskirts of Coventry, with a satellite campus in Wellesbourne and a central London base at the Shard. It is organised into three faculties—Arts, Science Engineering and Medicine, and Social Sciences—within which there are 32 departments. As of 2021, Warwick has around 29,534 full-time students and 2,691 academic and research ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pacific and Indian Oceans. Its Metropolitan France, metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea; overseas territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean. Due to its several coastal territories, France has the largest exclusive economic zone in the world. France borders Belgium, Luxembourg, Germany, Switzerland, Monaco, Italy, Andorra, and Spain in continental Europe, as well as the Kingdom of the Netherlands, Netherlands, Suriname, and Brazil in the Americas via its overseas territories in French Guiana and Saint Martin (island), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
