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Alexander Mihailovich Zamorzaev
Alexander Mihailovich Zamorzaev (; 27January 1927 – 1November 1997) was a Soviet mathematician and crystallographer. In 1953 Zamorzaev was the first to derive the complete list of magnetic space groups ( Shubnikov groups). In 1957 Zamorzaev founded the field of generalised antisymmetry by introducing the concept of more than one kind of two-valued antisymmetry operation. Life Career Zamorzaev was born on 23 January 1927 in Leningrad. In 1953 at the University of Leningrad, under the supervision of A.D. Aleksandrov, he gained the M.A. degree with the dissertation ''Generalization of Fedorov groups'', in which he developed the general theory of antisymmetry. In this work he derived for the first time the 1651 antisymmetry space groups, and named them "Shubnikov groups", after A.V. Shubnikov the pioneer of antisymmetry. In 1953 he became a mathematics lecturer at the newly opened University of Kishinev (Chișinău). Besides teaching the regular mathematics curriculum, and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint Petersburg State University
Saint Petersburg State University (SPBGU; ) is a public research university in Saint Petersburg, Russia, and one of the oldest and most prestigious universities in Russia. Founded in 1724 by a decree of Peter the Great, the university from the beginning has had a focus on fundamental research in science, engineering and humanities. During the Soviet period, it was known as Leningrad State University (). It was renamed after Andrei Zhdanov in 1948 and was officially called "Leningrad State University, named after A. A. Zhdanov and decorated with the Order of Lenin and the Order of the Red Banner of Labour." Zhdanov's was removed in 1989 and Leningrad in the name was officially replaced with Saint Petersburg in 1992. It is made up of 24 specialized faculties (departments) and institutes, the Academic Gymnasium, the Medical College, the College of Physical Culture and Sports, Economics and Technology. The university has two primary campuses: one on Vasilievsky Island and the ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Russian Academy Of Sciences
The Russian Academy of Sciences (RAS; ''Rossíyskaya akadémiya naúk'') consists of the national academy of Russia; a network of scientific research institutes from across the Russian Federation; and additional scientific and social units such as libraries, publishing units, and hospitals. Peter the Great established the academy (then the St. Petersburg Academy of Sciences) in 1724 with guidance from Gottfried Wilhelm Leibniz, Gottfried Leibniz. From its establishment, the academy benefitted from a slate of foreign scholars as professors; the academy then gained its first clear set of goals from the 1747 Charter. The academy functioned as a university and research center throughout the mid-18th century until the university was dissolved, leaving research as the main pillar of the institution. The rest of the 18th century continuing on through the 19th century consisted of many published academic works from Academy scholars and a few Academy name changes, ending as The Imperial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soviet Mathematicians
This list of Russian mathematicians includes the famous mathematicians from the Russian Empire, the Soviet Union and the Russian Federation. Alphabetical list __NOTOC__ A *Georgy Adelson-Velsky, inventor of AVL tree algorithm, developer of Kaissa, the first world computer chess champion *Sergei Adian, known for his work in group theory, especially on the Burnside problem *Aleksandr Danilovich Aleksandrov, Aleksandr Aleksandrov, developer of CAT(k) space and Alexandrov's uniqueness theorem in geometry *Pavel Alexandrov, author of the Alexandroff compactification and the Alexandrov topology *Dmitri Anosov, developed Anosov diffeomorphism *Vladimir Arnold, an author of the Kolmogorov–Arnold–Moser theorem in dynamical systems, solved Hilbert's 13th problem, raised the ADE classification and Arnold's rouble problems B *Alexander Beilinson, influential mathematician in representation theory, algebraic geometry and mathematical physics *Sergey Bernstein, developed the Bernstein p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1997 Deaths
This is a list of lists of deaths of notable people, organized by year. New deaths articles are added to their respective month (e.g., Deaths in ) and then linked below. 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 Earlier years ''Deaths in years earlier than this can usually be found in the main articles of the years.'' See also * Lists of deaths by day * Deaths by year (category) {{DEFAULTSORT:deaths by year ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1927 Births
Events January * January 1 – The British Broadcasting ''Company'' becomes the BBC, British Broadcasting ''Corporation'', when its Royal Charter of incorporation takes effect. John Reith, 1st Baron Reith, John Reith becomes the first Director-General. * January 7 ** The first transatlantic telephone call is made ''via radio'' from New York City, United States, to London, United Kingdom. ** The Harlem Globetrotters exhibition basketball team play their first ever road game in Hinckley, Illinois. * January 9 – The Laurier Palace Theatre fire at a movie theatre in Montreal, Quebec, Canada, kills 78 children. * January 10 – Fritz Lang's futuristic film ''Metropolis (1927 film), Metropolis'' is released in Germany. * January 11 – Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles, California. * January 24 – U.S. Marines United States occ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Academy Of Sciences Of Moldova
The Academy of Sciences of Moldova (), established in 1961, is the main scientific organization of Moldova and coordinates research in all areas of science and technology. Ion Tighineanu has been the head of the Academy of Sciences since April 9, 2019. History As early as June 1946, the Presidium of the USSR Academy of Sciences decided to establish the Moldovan Research Base of the USSR Academy of Sciences in Chisinau. In October 1949, the research base was transformed into the Moldavian branch of the USSR Academy of Sciences. The grand opening of the Academy took place on August 2, 1961. A meeting of the Academy of Sciences of Moldova in September 1994 confirms the reasoned scientific opinion of philologists that the correct name of the state language of Moldova is Romanian. Since September 2009, the University at the Academy of Sciences of Moldova has been operating in the country. In October 2017, President Igor Dodon signed a law that provides for the reform of the Academy of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moldavian Soviet Socialist Republic
The Moldavian Soviet Socialist Republic or Moldavian SSR (, mo-Cyrl, Република Советикэ Сочиалистэ Молдовеняскэ), also known as the Moldovan Soviet Socialist Republic, Moldovan SSR, Soviet Moldavia, Soviet Moldova, or simply Moldavia or Moldova, was one of the 15 republics of the Soviet Union which existed from 1940 to 1991. The republic was formed on 2 August 1940 from parts of Bessarabia, a region Soviet occupation of Bessarabia and Northern Bukovina, annexed from Romania on 28 June of that year, and parts of the Moldavian Autonomous Soviet Socialist Republic, an Autonomous Soviet Socialist Republics, autonomous Soviet republic within the Ukrainian SSR. After the Independence of Moldova, Declaration of Sovereignty on 23 June 1990, and until 23 May 1991, it was officially known as the Soviet Socialist Republic of Moldova. From 23 May 1991 until the declaration of independence on 27 August 1991, it was renamed the Republic of Moldova while ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symmetry
Symmetry () in everyday life refers to a sense of harmonious and beautiful proportion and balance. In mathematics, the term has a more precise definition and is usually used to refer to an object that is Invariant (mathematics), invariant under some Transformation (function), transformations, such as Translation (geometry), translation, Reflection (mathematics), reflection, Rotation (mathematics), rotation, or Scaling (geometry), scaling. Although these two meanings of the word can sometimes be told apart, they are intricately related, and hence are discussed together in this article. Mathematical symmetry may be observed with respect to the passage of time; as a space, spatial relationship; through geometric transformations; through other kinds of functional transformations; and as an aspect of abstract objects, including scientific model, theoretic models, language, and music. This article describes symmetry from three perspectives: in mathematics, including geometry, the m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychromatic Symmetry
Polychromatic symmetry is a colour symmetry which interchanges three or more colours in a symmetrical pattern. It is a natural extension of dichromatic symmetry. The coloured symmetry groups are derived by adding to the position coordinates (''x'' and ''y'' in two dimensions, ''x'','' y'' and ''z'' in three dimensions) an extra coordinate, ''k'', which takes three or more possible values (colours). An example of an application of polychromatic symmetry is crystals of substances containing molecules or ions in triplet states, that is with an electronic spin of magnitude 1, should sometimes have structures in which the spins of these groups have projections of + 1, 0 and -1 onto local magnetic fields. If these three cases are present with equal frequency in an orderly array, then the magnetic space group of such a crystal should be three-coloured. Example The group '' '' has three different rotation centres of order three (120°), but no reflections or glide reflections. There ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
