Sergey Sergeevich Ryshkov ( August 1, 1930 , Simferopol - April 6, 2006 , Moscow ) - Soviet and Russian mathematician-geometer, doctor of physical and mathematical sciences.
| Sergey Sergeevich Ryshkov | |
|---|---|
 | |
| Date of Birth | August 1, 1930 |
| Place of Birth | Simferopol |
| Date of death | April 6, 2006 (aged 75) |
| A place of death | Moscow |
| A country |  USSR →  Russia |
| Scientific field | maths |
| Place of work | Steklov Mathematical Institute , Moscow Institute of Physics and Technology , Moscow State University |
| Alma mater | MSU (mehmat) |
| Academic degree | Doctor of Physical and Mathematical Sciences |
| Academic rank | Professor |
| supervisor | P.S. Alexandrov |
| Awards and prizes |   |
Content
- 1 Biography
- 2 Scientific activities
- 3 notes
- 4 References
Biography
In 1953 he graduated with honors from the Faculty of Mechanics and Mathematics of Moscow State University . Pupil P.S. Alexandrov .
From 1961 until the end of his life he worked at the Mathematical Institute. V. A. Steklova , in the department of geometry organized and initially led by B. N. Delaunay .
He taught at a textile institute, at the Moscow Institute of Physics and Technology , and since 1984, he has been a professor at the Moscow State University .
Among his students are three doctors and more than ten candidates of science [1] .
He was awarded the medals "Veteran of Labor" (1987), "In memory of the 850th anniversary of Moscow" (1997).
Scientific activity
Published over 140 scientific papers.
The main works relate to the theory of point lattices or, in the terminology of B.N. Delaunay, to the geometry of positive quadratic forms, where he continued the research begun by A.N. Korkin , E.I. Zolotarev , G.F. Voronov . This problem goes back to crystallography; on the other hand, it is connected through the problem of densest packing of balls with such a branch of discrete mathematics as coding theory [2] .
Built a geometric algorithm for finding the maximum groups of integer n × n matrices.
Investigations in the theory of parallelohedra - convex polyhedra parallel, whose copies can be tiled without overlapping Euclidean space of a given dimension. Together with E.P. Baranovsky, he listed five-dimensional primitive parallelohedra. I solved the problem of the rarest lattice cover of an n- dimensional Euclidean space with identical balls for n = 4 (together with B. N. Delone), and for n = 5 (together with E. P. Baranovsky) [3] .
Notes
- ↑ Chebyshev Collection of Vol. VII, no. 2 (18), 2006 Archival copy of December 12, 2013 on the Wayback Machine (the issue is dedicated to the blessed memory of S. S. Ryshkov)
- ↑ S. S. Ryshkov, E. P. Baranovsky. Classical methods of the theory of lattice packaging // Uspekhi Mat . - 1979. - T. 34 , No. 4 (208) . - S. 3–63 .
- ↑ S. S. Ryshkov, E. P. Baranovsky. C -types of n -dimensional lattices and five-dimensional primitive parallelohedra (with application to the theory of coatings) . - Proceedings of the Steklov Mathematical Institute of the USSR. - 1976 .-- T. 137.
Links
- E.P. Baranovsky, N.P. Dolbilin, V.S. Makarov, A.A. Maltsev, S.P. Novikov, M.I. Shtogrin. Ryshkov Sergey Sergeevich (on his sixtieth birthday) ] // UMN . - 1991. - T. 46 , No. 3 (279) . - S. 227—229 .
- History of the Department of Geometry and Topology, Steklov Mathematical Institute
- Ryshkov Sergey Sergeevich (1930-2006) , Math-Net.Ru