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Majumdar–Papapetrou Solution
Sudhansu Datta Majumdar (1915 – 1997) was an Indian physicist, and faculty member of the Indian Institute of Technology, Kharagpur. Biography Born in 1915 in Sylhet (now in Bangladesh), Sudhansu Datta Majumdar had his education in Sylhet; Presidency College, Calcutta, and University College of Science also called Rajabazar Science College, Calcutta University. In an academic career spanning several decades, he served in different capacities in various institutions. Beginning with a stint in the Palit Laboratory of Physics, Rajabazar Science College, Calcutta University, from where he wrote the now famous Majumdar–Papapetrou paper, he was appointed Lecturer in Physics in Calcutta University in 1951. Subsequently, he became a reader there in 1960. During 1956–57, he went to Cambridge University, United Kingdom, on an educational tour to interact with P. A. M. Dirac. In 1962, Majumdar obtained the rare honour of the degree of D.Sc. in Physics from Sc. College, Calcut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylhet
Sylhet ( bn, সিলেট) is a metropolitan city in northeastern Bangladesh. It is the administrative seat of the Sylhet Division. Located on the north bank of the Surma River at the eastern tip of Bengal, Sylhet has a subtropical climate and lush highland terrain. The city has a population of more than half a million and is one of the largest cities in Bangladesh after Dhaka, Chittagong and Khulna. Sylhet is one of Bangladesh's most important spiritual and cultural centres. Furthermore, it is one of the most economically important cities after Dhaka and Chittagong. The city produces the highest amount of tea and natural gas. The hinterland of the Sylhet valley is the largest oil and gas-producing region in Bangladesh. It is also the largest hub of tea production in Bangladesh. It is notable for its high-quality cane and agarwood. The city is served by the Osmani International Airport, named after General Bangabir M A G Osmani, the Commander-in-Chief of the Mukti Bahini duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcutta Mathematical Society
The Calcutta Mathematical Society (CalMathSoc) is an association of professional mathematicians dedicated to the interests of mathematical research and education in India. The Society has its head office located at Kolkata, India. History Calcutta Mathematical Society was established on 6 September 1908 under the stewardship of Sir Asutosh Mookerjee, the then Vice-Chancellor of Calcutta University. He was the founder president of the Society, and was assisted by Sir Gurudas Banerjee, Prof. C.E. Cullis and Prof. Gauri Sankar Dey as Vice Presidents and Prof. Phanindra Lal Ganguly as the Founder Secretary of the organization. It is said that the founders were inspired by the structure and operations of the London Mathematical Society while forming this organization. Over more than the last 100 years, the Society has fostered teaching and research of theoretical and applied mathematical sciences through several pedagogic and technical activities. It is honored to be associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmic Strings
Cosmic strings are hypothetical 1-dimensional topological defects which may have formed during a symmetry-breaking phase transition in the early universe when the topology of the vacuum manifold associated to this symmetry breaking was not simply connected. Their existence was first contemplated by the theoretical physicist Tom Kibble in the 1970s. The formation of cosmic strings is somewhat analogous to the imperfections that form between crystal grains in solidifying liquids, or the cracks that form when water freezes into ice. The phase transitions leading to the production of cosmic strings are likely to have occurred during the earliest moments of the universe's evolution, just after cosmological inflation, and are a fairly generic prediction in both quantum field theory and string theory models of the early universe. Theories containing cosmic strings In string theory, the role of cosmic strings can be played by the fundamental strings (or F-strings) themselves that define ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Weyl
Hermann Klaus Hugo Weyl, (; 9 November 1885 – 8 December 1955) was a German mathematician, theoretical physicist and philosopher. Although much of his working life was spent in Zürich, Switzerland, and then Princeton, New Jersey, he is associated with the University of Göttingen tradition of mathematics, represented by Carl Friedrich Gauss, David Hilbert and Hermann Minkowski. His research has had major significance for theoretical physics as well as purely mathematical disciplines such as number theory. He was one of the most influential mathematicians of the twentieth century, and an important member of the Institute for Advanced Study during its early years. Weyl contributed to an exceptionally wide range of mathematical fields, including works on space, time, matter, philosophy, logic, symmetry and the history of mathematics. He was one of the first to conceive of combining general relativity with the laws of electromagnetism. Freeman Dyson wrote that Weyl alone bore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Communications In Mathematical Physics
''Communications in Mathematical Physics'' is a peer-reviewed academic journal published by Springer. The journal publishes papers in all fields of mathematical physics, but focuses particularly in analysis related to condensed matter physics, statistical mechanics and quantum field theory, and in operator algebras, quantum information and relativity. History Rudolf Haag conceived this journal with Res Jost, and Haag became the Founding Chief Editor. The first issue of ''Communications in Mathematical Physics'' appeared in 1965. Haag guided the journal for the next eight years. Then Klaus Hepp succeeded him for three years, followed by James Glimm, for another three years. Arthur Jaffe began as chief editor in 1979 and served for 21 years. Michael Aizenman became the fifth chief editor in the year 2000 and served in this role until 2012. The current editor-in-chief is Horng-Tzer Yau. Archives Articles from 1965 to 1997 are available in electronic form free of charge, via Pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Hartle
James Burkett Hartle (August 20, 1939) is an American physicist. He has been a professor of physics at the University of California, Santa Barbara since 1966, and he is currently a member of the external faculty of the Santa Fe Institute. Hartle is known for his work in general relativity, astrophysics, and interpretation of quantum mechanics. Work In collaboration with Murray Gell-Mann and others, Hartle developed an alternative to the standard Copenhagen interpretation, more general and appropriate to quantum cosmology, based on consistent histories. With Dieter Brill in 1964, he discovered the Brill–Hartle geon, an approximate solution realizing Wheeler's suggestion of a hypothetical phenomenon in which a gravitational wave packet is confined to a compact region of spacetime by the gravitational attraction of its own field energy. With Kip Thorne, Hartle derived from general relativity the laws of motion and precession of black holes and other relativistic bodies, includi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Werner Israel
Werner Israel, (October 4, 1931 – May 18, 2022) was a physicist, author, researcher, and professor at the University of Victoria. Biography Born in Berlin, Germany and raised in Cape Town, South Africa, he first received his B.Sc. in 1951 and later his M.Sc. in 1954 from the University of Cape Town. From 1956 to 1958, he worked as a scholar at the Dublin Institute for Avanced Studies. He then went on to receive his Ph.D. in 1960 from Trinity College, Dublin. In 1990, together with Eric Poisson, Israel pioneered the study of black hole interiors and, following up a suggestion of Roger Penrose, discovered the phenomenon of mass inflation (which should not be confused with inflationary cosmology). He was a Fellow in the cosmology programme of the Canadian Institute for Advanced Research. Until his retirement in 1996 he was a professor in the Department of Physics at the University of Alberta. In 1996 he was appointed Adjunct Professor of Physics and Astronomy at the Univer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proceedings Of The Royal Irish Academy, Section A
The ''Proceedings of the Royal Irish Academy'' (''PRIA'') is the journal of the Royal Irish Academy, founded in 1785 to promote the study of science, polite literature Polite may refer to: * Politeness * ''Polite'' (magazine), an American humor magazine * Polite architecture or "the Polite", an architectural theory and style * Lousaka Polite Lousaka Romon Polite (born September 14, 1981) is a former American ..., and antiquities. It was known as several titles over the years: *1836-1866: ''Proceedings of the Royal Irish Academy'' *1870-1884: ''Proceedings of the Royal Irish Academy. Science'' *1879: ''Proceedings of the Royal Irish Academy. Polite Literature and Antiquities'' *1889-1901: ''Proceedings of the Royal Irish Academy'' In 1902, the journal split into three sections ''Section A: Mathematical and Physical Sciences'', ''Section B: Biological, Geological, and Chemical Science'' and ''Section C: Archaeology, Culture, History, Literature''. ''Section A'' is now publish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ansatz (journal)
In physics and mathematics, an ansatz (; , meaning: "initial placement of a tool at a work piece", plural ansätze ; ) is an educated guess or an additional assumption made to help solve a problem, and which may later be verified to be part of the solution by its results. Use An ansatz is the establishment of the starting equation(s), the theorem(s), or the value(s) describing a mathematical or physical problem or solution. It typically provides an initial estimate or framework to the solution of a mathematical problem, and can also take into consideration the boundary conditions (in fact, an ansatz is sometimes thought of as a "trial answer" and an important technique in solving differential equations). After an ansatz, which constitutes nothing more than an assumption, has been established, the equations are solved more precisely for the general function of interest, which then constitutes a confirmation of the assumption. In essence, an ansatz makes assumptions about the form o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectroscopy
Spectroscopy is the field of study that measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter as a function of the wavelength or frequency of the radiation. Matter waves and acoustic waves can also be considered forms of radiative energy, and recently gravitational waves have been associated with a spectral signature in the context of the Laser Interferometer Gravitational-Wave Observatory (LIGO) In simpler terms, spectroscopy is the precise study of color as generalized from visible light to all bands of the electromagnetic spectrum. Historically, spectroscopy originated as the study of the wavelength dependence of the absorption by gas phase matter of visible light dispersed by a prism. Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields of astronomy, chemistry, materials science, and physics, allowing the composition, physical structure and e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
