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Martine Queffélec
Martine Queffélec (née Joublin, born 1949) is a French mathematician associated with the University of Lille and known for her research on continued fractions, Diophantine approximation, combinatorics on words, L-systems, and related topics in dynamical systems. Education and career Queffélec defended her doctoral dissertation in 1984. By 1987, she was working at the Université Sorbonne Paris Nord; she moved to the Lille University of Science and Technology in 1993. Books Queffélec is the author of the book ''Substitution Dynamical Systems – Spectral Analysis'' (Springer, Lecture Notes in Mathematics 1294, 1987; 2nd ed., 2010). She is the co-author, with Hervé Queffélec, of ''Diophantine Approximation and Dirichlet Series'' (Harish-Chandra Research Institute Lecture Notes 2, 2013). Recognition In 2011, the Lille University of Science and Technology hosted a conference "Analyse 2011" in honor of both Martine and Hervé Queffélec. Personal life and family Queffélec' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Lille
The University of Lille (french: Université de Lille, abbreviated as ULille, UDL or univ-lille) is a French public research university based in Lille, Hauts-de-France. It has its origins in the University of Douai (1559), and resulted from the merger of three universities – Lille 1 University of Science and Technology, Lille 2 University of Health and Law, and Charles de Gaulle University – Lille III in 2018. With more than 74,000 students, it is one of the largest universities in France and one of the largest French-speaking universities in the world. Since 2017, the university has been funded as one of the French universities of excellence. It benefits from an endowment of 500 million euros to accelerate its strategy in education, research, international development and outreach. With 66 research labs, 350 PhD theses supported per year and 3,000 scientific publications each year, it is well represented in the research community; it collaborates with many organizations ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Continued Fraction
In mathematics, a continued fraction is an expression obtained through an iterative process of representing a number as the sum of its integer part and the reciprocal of another number, then writing this other number as the sum of its integer part and another reciprocal, and so on. In a finite continued fraction (or terminated continued fraction), the iteration/recursion is terminated after finitely many steps by using an integer in lieu of another continued fraction. In contrast, an infinite continued fraction is an infinite expression. In either case, all integers in the sequence, other than the first, must be positive. The integers a_i are called the coefficients or terms of the continued fraction. It is generally assumed that the numerator of all of the fractions is 1. If arbitrary values and/or functions are used in place of one or more of the numerators or the integers in the denominators, the resulting expression is a generalized continued fraction. When it is ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diophantine Approximation
In number theory, the study of Diophantine approximation deals with the approximation of real numbers by rational numbers. It is named after Diophantus of Alexandria. The first problem was to know how well a real number can be approximated by rational numbers. For this problem, a rational number ''a''/''b'' is a "good" approximation of a real number ''α'' if the absolute value of the difference between ''a''/''b'' and ''α'' may not decrease if ''a''/''b'' is replaced by another rational number with a smaller denominator. This problem was solved during the 18th century by means of continued fractions. Knowing the "best" approximations of a given number, the main problem of the field is to find sharp upper and lower bounds of the above difference, expressed as a function of the denominator. It appears that these bounds depend on the nature of the real numbers to be approximated: the lower bound for the approximation of a rational number by another rational number is larger than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Combinatorics On Words
Combinatorics on words is a fairly new field of mathematics, branching from combinatorics, which focuses on the study of words and formal languages. The subject looks at letters or symbols, and the sequences they form. Combinatorics on words affects various areas of mathematical study, including algebra and computer science. There have been a wide range of contributions to the field. Some of the first work was on square-free words by Axel Thue in the early 1900s. He and colleagues observed patterns within words and tried to explain them. As time went on, combinatorics on words became useful in the study of algorithms and coding. It led to developments in abstract algebra and answering open questions. Definition Combinatorics is an area of discrete mathematics. Discrete mathematics is the study of countable structures. These objects have a definite beginning and end. The study of enumerable objects is the opposite of disciplines such as analysis, where calculus and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L-system
An L-system or Lindenmayer system is a parallel rewriting system and a type of formal grammar. An L-system consists of an alphabet of symbols that can be used to make strings, a collection of production rules that expand each symbol into some larger string of symbols, an initial "axiom" string from which to begin construction, and a mechanism for translating the generated strings into geometric structures. L-systems were introduced and developed in 1968 by Aristid Lindenmayer, a Hungarian theoretical biologist and botanist at the University of Utrecht. Lindenmayer used L-systems to describe the behaviour of plant cells and to model the growth processes of plant development. L-systems have also been used to model the morphology of a variety of organisms and can be used to generate self-similar fractals. Origins As a biologist, Lindenmayer worked with yeast and filamentous fungi and studied the growth patterns of various types of bacteria, such as the cyanobacteria '' Ana ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamical System
In mathematics, a dynamical system is a system in which a function describes the time dependence of a point in an ambient space. Examples include the mathematical models that describe the swinging of a clock pendulum, the flow of water in a pipe, the random motion of particles in the air, and the number of fish each springtime in a lake. The most general definition unifies several concepts in mathematics such as ordinary differential equations and ergodic theory by allowing different choices of the space and how time is measured. Time can be measured by integers, by real or complex numbers or can be a more general algebraic object, losing the memory of its physical origin, and the space may be a manifold or simply a set, without the need of a smooth space-time structure defined on it. At any given time, a dynamical system has a state representing a point in an appropriate state space. This state is often given by a tuple of real numbers or by a vector in a geome ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Université Sorbonne Paris Nord
Sorbonne Paris North University (french: Université Sorbonne Paris Nord) is a public university based in Paris, France. It is one of the thirteen universities that succeeded the University of Paris in 1968. It is a multidisciplinary university located in north of Paris, in the municipalities of Villetaneuse, Saint-Denis, La Plaine Saint-Denis, Bobigny and Argenteuil. Successively named “Université Paris XIII”, “Université Paris-Nord”, “Université Paris 13 Paris Nord”, then “Université Paris 13”, it has been known by several names during the last half century. Most recently it was renamed "Université Sorbonne Paris Nord" on January 1, 2020. The University Sorbonne Paris Nord is a major teaching and research center located north of Paris. It has five campuses, spread over the two departments of Seine-Saint-Denis and Val d'Oise: Villetaneuse, Bobigny, Saint-Denis, the Plaine Saint-Denis and Argenteuil. The university has more than 25,000 students in initial o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lecture Notes In Mathematics
''Lecture Notes in Mathematics'' is a book series in the field of mathematics, including articles related to both research and teaching. It was established in 1964 and was edited by A. Dold, Heidelberg and B. Eckmann, Zürich. Its publisher is Springer Science+Business Media (formerly Springer-Verlag). The intent of the series is to publish not only lecture notes, but results from seminars and conferences, more quickly than the several-years-long process of publishing polished journal papers in mathematics. In order to speed the publication process, early volumes of the series (before electronic publishing) were reproduced photographically from typewritten manuscripts. According to Earl Taft it has been "enormously successful" and "is considered a very valuable service to the mathematical community". there have been 2232 volumes in this series. See also * ''Lecture Notes in Physics'' * ''Lecture Notes in Computer Science ''Lecture Notes in Computer Science'' is a series of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Queffélec
Henri Queffélec (29 January 1910 – 13 January 1992) was a French writer and screenwriter. Biography He studied at the lycée Louis-le-Grand and then the École normale supérieure. He obtained the "agrégation de lettres" in 1934. He is considered the great maritime novelist in French of the 20th century; Queffélec was the author of more than 80 books, many of which were inspired by his native Brittany and by the sea, e.g. ''Un recteur de l'Île de Sein'' which was filmed by Jean Delannoy under the title ''Dieu a besoin des hommes''. He was awarded the Grand prix du roman of the Académie française in 1958 for ''Un royaume sous la mer'' ; he was awarded the ordre de l'Hermine in 1988. Henri Queffélec was the father of the author Yann Queffélec, the pianist Anne Queffélec Anne Queffélec (born 17 January 1948) is a French classical pianist, born in Paris. Biography Anne Queffélec is the daughter of Henri Queffélec and sister of Yann Queffélec, both noted wri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anne Queffélec
Anne Queffélec (born 17 January 1948) is a French classical pianist, born in Paris. Biography Anne Queffélec is the daughter of Henri Queffélec and sister of Yann Queffélec Yann Queffélec (born 4 September 1949 in Paris) is a French author who won the Prix Goncourt in 1985 for his novel '' Les Noces barbares'', translated into English as '' The Wedding''. He is the former husband of the late pianist Brigitte Engerer ..., both noted writers. Her brother Hervé Queffélec is a mathematician. She attended the Cours Hattemer, a private school. Despite an early passion for literature, she chose a life in music at a young age. She started playing piano at the age of five. In 1964, she enrolled in the Paris Conservatoire. She won the first prize for piano in 1965 and the first prize for chamber music in 1966. She continued her education with Paul Badura-Skoda and Jörg Demus, and went on to study in Vienna with Alfred Brendel. She won the first prize at the Munich compe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yann Queffélec
Yann Queffélec (born 4 September 1949 in Paris) is a French author who won the Prix Goncourt in 1985 for his novel '' Les Noces barbares'', translated into English as '' The Wedding''. He is the former husband of the late pianist Brigitte Engerer Brigitte Engerer (; 27 October 1952 – 23 June 2012) was a French pianist. Biography Born in Tunis, French Tunisia, Engerer started piano lessons at the age of four, and by the age of six was performing in public. When she was 11 her fami ... and the brother of musician Anne Queffélec. Their father was the writer Henri Queffélec. Partial bibliography * ''Les Noces barbares'' (1984) * ''Osmose'' (2000) * ''The Sea'' (2003): coauthor with photographer Philip Plisson and Eliane Georges. References 1949 births Living people Writers from Paris 20th-century French novelists 21st-century French novelists Prix Goncourt winners Writers from Brittany French male novelists 20th-century French male writers 21st-century ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1949 Births
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 One-party state, single party government of the Republican People's Party. * January 17 – The first Volkswagen Beetle, VW Type 1 to arrive in the United States, a 1948 model, is brought to New York City, New York by Dutch businessman Ben Pon Sr., Ben Pon. Unable to interest dealers or importers in the Volkswagen, Pon sells the sample car to pay his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
