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Tilman Sauer
Tilman Sauer (born 1963) is a German theoretical physicist and historian of the natural sciences. He has an international reputation as an expert on the history of the development of general relativity theory. Education and career At the Free University of Berlin, Sauer received in 1990 his ''Diplom'' in theoretical physics and in 1994 his doctorate (''Promotion'') in theoretical physics. His doctoral dissertation is entitled ''Development and Application of Refined Path Monte Carlo Methods''. From 1991 to 1996 he was employed as a research scholar at Berlin's Max Planck Institute for Human Development. In 1996 from March to December he worked at Berlin's Max Planck Institute for the History of Science. From 1997 to 1999 he worked for the project ''Hilbert-Edition'' at the University of Göttingen's Institute for the History of Science. From 1999 to 2001 he was an assistant professor (''Hochschulassistent'') at the University of Bern's Institute for the History of Science, where he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Free University Of Berlin
The Free University of Berlin (, often abbreviated as FU Berlin or simply FU) is a public university, public research university in Berlin, Germany. It was founded in West Berlin in 1948 with American support during the early Cold War period as a West Berlin, Western continuation of the Humboldt University of Berlin, Friedrich Wilhelm University, or the University of Berlin, whose traditions and faculty members it retained. The Friedrich Wilhelm University (which was renamed the Humboldt University of Berlin, Humboldt University), being in East Berlin, was subject to East Germany's comparatively restrictive information laws. The ''Free University'' 's name referred to West Berlin's status as part of the intellectual continua of the Western "Free World, ''Free'' World", contrasting with communist-controlled East Berlin. In 2008, as part of a joint effort, the Free University of Berlin, along with the Hertie School of Governance, and WZB Berlin Social Science Center, WZB Social ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravitational Lensing
A gravitational lens is matter, such as a galaxy cluster, cluster of galaxies or a point particle, that bends light from a distant source as it travels toward an observer. The amount of gravitational lensing is described by Albert Einstein's General relativity, general theory of relativity. If light is treated as Corpuscular theory of light, corpuscles travelling at the speed of light, Newtonian physics also predicts the bending of light, but only half of that predicted by general relativity. Orest Khvolson (1924) and Frantisek Link (1936) are generally credited with being the first to discuss the effect in print, but it is more commonly associated with Einstein, who made unpublished calculations on it in 1912 and published an article on the subject in 1936. In 1937, Fritz Zwicky posited that galaxy clusters could act as gravitational lenses, a claim confirmed in 1979 by observation of the Twin QSO SBS 0957+561. Description Unlike an lens (optics), optical lens, a point-li ... [...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 January 1963 lunar eclipse, 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 January 1963 lunar eclipse, penumbral lunar eclipse and the Solar eclipse of January 25, 1963, annular solar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David E
David (; , "beloved one") was a king of ancient Israel and Judah and the third king of the United Monarchy, according to the Hebrew Bible and Old Testament. The Tel Dan stele, an Aramaic-inscribed stone erected by a king of Aram-Damascus in the late 9th/early 8th centuries BCE to commemorate a victory over two enemy kings, contains the phrase (), which is translated as " House of David" by most scholars. The Mesha Stele, erected by King Mesha of Moab in the 9th century BCE, may also refer to the "House of David", although this is disputed. According to Jewish works such as the '' Seder Olam Rabbah'', '' Seder Olam Zutta'', and '' Sefer ha-Qabbalah'' (all written over a thousand years later), David ascended the throne as the king of Judah in 885 BCE. Apart from this, all that is known of David comes from biblical literature, the historicity of which has been extensively challenged,Writing and Rewriting the Story of Solomon in Ancient Israel; by Isaac Kalimi; pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivor Grattan-Guinness
Ivor Owen Grattan-Guinness (23 June 1941 – 12 December 2014) was a historian of mathematics and logic. Life Grattan-Guinness was born in Bakewell, England; his father was a mathematics teacher and educational administrator. He gained his bachelor degree as a Mathematics Scholar at Wadham College, Oxford, and an MSc (Econ) in Mathematical Logic and the Philosophy of Science at the London School of Economics in 1966. He gained both the doctorate (PhD) in 1969, and higher doctorate ( D.Sc.) in 1978, in the History of Science at the University of London. He was Emeritus Professor of the History of Mathematics and Logic at Middlesex University, and a Visiting Research Associate at the London School of Economics. He was awarded the Kenneth O. May Medal for services to the History of Mathematics by the International Commission on the History of Mathematics (ICHM) on 31 July 2009, at Budapest, on the occasion of the 23rd International Congress for the History of Science. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euler Lecture
The Euler Lecture (''Euler-Vorlesung in Sanssouci'') is a mathematics lecture given at an annual event at the University of Potsdam (''Universität Potsdam''). The event, initiated in 1993, is organized by the ''Universität Potsdam, Institut for Mathematik'', the ''Humboldt University of Berlin, Humboldt-Universität zu Berlin, Institut für Mathematik'', and the ' with the assistance of several other organizations, including the ''Freie Universität Berlin, Fachbereich Mathematik und Informatik'', the ''Technische Universität Berlin'', Institut für Mathematic, the Zuse Institute Berlin, ''Zuse-Institut Berlin'' (ZIB), and the ''Deutsche Mathematiker-Vereinigung'' (DMV). The mathematical lecturer is selected by a distinguished jury. The event also contains a historical lecture (''Vortrag'') and a musical program supporting the event. The Euler Lecture is named in honor of Leonhard Euler, who spent the years from 1741 to 1766 in Berlin and during that time wrote approximately 380 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Path Integral Formulation
The path integral formulation is a description in quantum mechanics that generalizes the stationary action principle of classical mechanics. It replaces the classical notion of a single, unique classical trajectory for a system with a sum, or functional integral, over an infinity of quantum-mechanically possible trajectories to compute a quantum amplitude. This formulation has proven crucial to the subsequent development of theoretical physics, because manifest Lorentz covariance (time and space components of quantities enter equations in the same way) is easier to achieve than in the operator formalism of canonical quantization. Unlike previous methods, the path integral allows one to easily change coordinates between very different canonical descriptions of the same quantum system. Another advantage is that it is in practice easier to guess the correct form of the Lagrangian of a theory, which naturally enters the path integrals (for interactions of a certain type, these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Feynman
Richard Phillips Feynman (; May 11, 1918 – February 15, 1988) was an American theoretical physicist. He is best known for his work in the path integral formulation of quantum mechanics, the theory of quantum electrodynamics, the physics of the superfluidity of supercooled liquid helium, and in particle physics, for which he proposed the parton model. For his contributions to the development of quantum electrodynamics, Feynman received the Nobel Prize in Physics in 1965 jointly with Julian Schwinger and Shin'ichirō Tomonaga. Feynman developed a pictorial representation scheme for the mathematical expressions describing the behavior of subatomic particles, which later became known as Feynman diagrams and is widely used. During his lifetime, Feynman became one of the best-known scientists in the world. In a 1999 poll of 130 leading physicists worldwide by the British journal ''Physics World'', he was ranked the seventh-greatest physicist of all time. He assisted in the Manhatt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leo Corry
Leo Corry (; born 1956 in Santiago de Chile) is an Israeli historian of mathematics. Biography Corry migrated with his Jewish family to Venezuela when he was two years old. He attended primary and secondary school at Colegio Moral y Luces of Caracas and then at the Universidad Simón Bolívar studied mathematics with licentiate's degree in 1977. He attended graduate school at the University of Tel Aviv. There he received in 1983 his master's degree in mathematics with master's thesis ''Splitting data in cohomology classes'', supervised by Shmuel Rosset, and in 1990 his Ph.D. in the history of science with Ph.D. thesis ''The origins of category theory as a mathematical discipline'', supervised by Sabetai Unguru and Shmuel Rosset. At the University of Tel Aviv, Corry became in 1985 an instructor, in 1996 a lecturer, in 2004 an associate professor and from 2007 a full professor in the Cohn Institute for the History of Science. He was the Director of the Cohn Institute from 2003 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Page Proof
In printing and publishing, proofs are the preliminary versions of publications meant for review by authors, editors, and proofreaders, often with extra-wide margins. Galley proofs may be uncut and unbound, or in some cases electronically transmitted. They are created for proofreading and copyediting purposes, but may also be used for promotional and review purposes. Historical galley proofs Proof, in the typographical sense, is a term that dates to around 1600. The primary goal of proofing is to create a tool for verification that the job is accurate separate from the pages produced on the press. All needed or suggested changes are physically marked on paper proofs or electronically marked on electronic proofs by the author, editor, and proofreaders. The compositor, typesetter, or printer receives the edited copies, corrects and re-arranges the type or the pagination, and arranges for the press workers to print the final or published copies. Galley proofs or galleys are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Relativity Priority Dispute
Albert Einstein's discovery of the gravitational field equations of general relativity and David Hilbert's almost simultaneous derivation of the theory using an elegant variational principle, during a period when the two corresponded frequently, has led to numerous historical analyses of their interaction. The analyses came to be called a priority dispute. Einstein and Hilbert The events of interest to historians of the dispute occurred in late 1915. At that time Albert Einstein, now perhaps the most famous modern scientist, had been working on gravitational theory since 1912. He had "developed and published much of the framework of general relativity, including the ideas that gravitational effects require a tensor theory, that these effects determine a non-Euclidean geometry, that this metric role of gravitation results in a redshift and in the bending of light passing near a massive body." While David Hilbert never became a celebrity, he was seen as a mathematician unequ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Hilbert
David Hilbert (; ; 23 January 1862 – 14 February 1943) was a German mathematician and philosopher of mathematics and one of the most influential mathematicians of his time. Hilbert discovered and developed a broad range of fundamental ideas including invariant theory, the calculus of variations, commutative algebra, algebraic number theory, the foundations of geometry, spectral theory of operators and its application to integral equations, mathematical physics, and the foundations of mathematics (particularly proof theory). He adopted and defended Georg Cantor's set theory and transfinite numbers. In 1900, he presented a collection of problems that set a course for mathematical research of the 20th century. Hilbert and his students contributed to establishing rigor and developed important tools used in modern mathematical physics. He was a cofounder of proof theory and mathematical logic. Life Early life and education Hilbert, the first of two children and only son of O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
