Evgraf Fedorov

Evgraf Stepanovich Fedorov (Russian: Евгра́ф Степа́нович Фёдоров, 22 December [O.S. 10 December] 1853 – 21 May 1919) was a Russian mathematician, crystallographer and mineralogist.[1][2][3]

Evgraf Fedorov
Evgraf Stepanovich Fedorov
Born(1853-12-22)22 December 1853
Orenburg, Russian Empire
Died21 May 1919(1919-05-21) (aged 65)
Petrograd, RSFSR

Fedorov was born in the Russian city of Orenburg. His father was a topographical engineer. The family later moved to Saint Petersburg. From the age of fifteen, he was deeply interested in the theory of polytopes, which later became his main research interest. He was a distinguished graduate of the Gorny Institute, which he joined at the age of 26. He was elected the first Director of the Institute in 1905.[4]

He contributed to the identification of conditions under which a group of Euclidean motions must have a translational subgroup whose vectors span the Euclidean space. He undertook investigations into crystal structure as early as 1881.[5] His best-known result is his 1891 derivation of the 230 symmetry space groups which now serve as the mathematical basis of structural analysis. He also proved that there are only 17 possible wallpaper groups which can tile a Euclidean plane.[6] This was then proved independently by George Pólya in 1924.[7] The proof that the list of wallpaper groups was complete only came after the much harder case of space groups had been settled. In 1895, he became a professor of geology at the Moscow Agricultural Institute (now the Timiryazev Academy). Fedorov died from pneumonia in 1919 during the Russian Civil War in Petrograd, RSFSR.

He developed the Federov stage for polarizing microscopes, a tool for crystallography which allows a mineral specimen to be studied under precise angles of tilt and rotation, providing an analysis of crystal structure.[8]

Publications
  • His first book, Basics of Polytopes, was finished in 1879 and published in 1885. It offers a classification of polytopes and derives Fedorov polytopes, congruent polytopes that can completely fill space.
  • He wrote the classic The Symmetry of Regular Systems of Figures in 1891,[9] which contained the first cataloging of the 230 space groups. The same year the equivalent results were presented by German mathematician Schönflies. Fedorov and Schönflies had been intensively discussing the subject during their work, so the results can be somehow considered as joint ones, though Schönflies noted Fedorov's priority for some major ideas.
  • He published his classic work The Theodolite Method in Mineralogy and Petrography in 1893.[10]
  • In 1906 he published Perfektsionizm (Perfectionism), a work he had started in the late 1870s. From a materialistic starting point he argued that natural conditions are themselves conditions of eternal change. He attacked authors claim that there is stability and equilibrium in nature. Contrariwise he claimed that evolution is quality of living creatures rather than a tendency toward a "higher order" of stability, and equilibrium of organisms. He criticised Herbert Spencer's views arguing that such views when applied to the evolution of natural history focus attention on the least changeable. However, he argued that such views systematically failed to take into account the fact that equilibrium is attained only at the moment of death: for a living creature, changing forms are constantly developing. Thus Fyodorov criticised the notion that the constant and the stable are the supreme mission of life. Rather he claimed that life never finally achieves anything but always strives to achieve. For him this is where the true philosophy of nature is to be found.[11]
  • Tsarstvo kristallov (Crystal Kingdom) was first published posthumously in 1920 and featured much of the work carried out by Fyodorov and his colleagues. during the previous of forty years. Here he noted that sciences which have been fully developed not only satisfy the spiritual needs of part of mankind but also provide great power to direct the active forces of nature for man’s use.[11]

Legacy
Evgraf Fjodorow Strasse

There is a street named after him on the site of the international X-ray laser research facility European XFEL in Schenefeld near Hamburg.

gollark: That doesn't matter for GPU upgrades though.
gollark: It's LGA1151 (v1), given the CPU.
gollark: The best CPU you could get on that board is probably then the i7-7700K, which is at least two generations outdated at this point so probably horribly expensive.
gollark: That CPU's still okay, I think, so you could just get a better GPU for now.
gollark: What are the specs of your current computer, then?

See also

References
  1. I. I. Shafranovskii and N. V. Belov, "In Memoriam: E. S. Fedorov 1853–1919," in P. P. Ewald, ed., Fifty Years of X-ray Diffraction (Utrecht, Nederland: International Union of Crystallography, 1962), pages 341–350. PDF online
  2. R.V. Galiulin (November 2003) "To the 150th anniversary of the birth of Evgraf Stepanovich Federov (1853–1919): Irregularities in the fate of the theory of regularity," Crystallography Reports, 48 (6) : 899–913. PDF online
  3. A. Meniailov, "Fyodorov (or Fedorov), Evgraf Stepanovich" in Charles C. Gillispie, editor in chief, Dictionary of Scientific Biography (New York, New York: Charles Scribner's Sons, 1972), vol. 5, pp. 210–214.
  4. Biggart, John; John, King (1998). "Profiles of Russian scientists and philosophers". Alexander Boganov and the Origins of Systems Thinking in Russia.
  5. See:
  6. Fedorov, E.S. (1891). "Симметрія на плоскости" [Simmetriya na ploskosti, Symmetry in the plane]. Записки Императорского С.-Петербургского Минералогического Общества (Zapiski Imperatorskova Sankt-Petersburgskova Mineralogicheskova Obshchestva, Proceedings of the Imperial St. Petersburg Mineralogical Society). 2nd series (in Russian). 28: 345–390.
  7. George Pólya (1924) "Über die Analogie der Kristallsymmetrie in der Ebene" (On the analog of crystal symmetry in the plane), Zeitschrift für Kristallographie, 60 : 278–282.
  8. "An improved polarizing microscope IV. The Federov stage (three-axis)" (PDF). Mineralogical Magazine. 1949. Retrieved 4 September 2019.
  9. E. S. Fedorov (1891) "Симметрія правильныхъ системъ фигуръ" (Simmetriya pravil'nykh sistem figur, The symmetry of regular systems of figures), Записки Императорского С.-Петербургского Минералогического Общества (Zapiski Imperatorskova Sankt Petersburgskova Mineralogicheskova Obshchestva, Proceedings of the Imperial St. Petersburg Mineralogical Society), series 2, 28 : 1–146. (in Russian) English translation: David and Katherine Harker (trans.), Symmetry of Crystals, American Crystallographic Association Monograph No. 7 [Buffalo, N.Y.: American Crystallographic Association, 1971], pages 50–131.
  10. Kunz, George Frederick and Wherry, Edgar T. (3 June 1921) "Russian Geologists" Science, new series, 53 (1379): 516–517
  11. Meniailov, A. "Fyodorov (or Fedorov), Evgraf Stepanovich". www.encyclopedia.com. Retrieved 12 April 2020.
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