5,459 research outputs found
“I Began Understand Piłsudski, When I Reached His Age”. Memoirs of G.F. Matveev in the Form of Interview
No full textGennady Filippovich Matveev (born in 1943), Doctor of Historical Sciences, Honored Professor of Moscow University, Head of the Department of the History of the Southern and Western Slavs of Moscow State University, one of the leading domestic specialists in the modern history of Poland, tells about his life and professional activities at the request of the editors of the journal Slavic World in the Third Millennium. Born on the banks of the Volga, G.F. Matveev spent his childhood and youth in Western Ukraine. Since 1966, his whole life has been inextricably linked with the Moscow University, where he received a diploma in history, completed his postgraduate studies, defended his candidate's and doctoral theses, and where he has been teaching for half a century and was head of the department for more than three decades. The students of G.F. Matveev completed and defended a large number of diplomas, master's and candidate's theses, they work in different cities of the country and abroad. As a historian, G.F. Matveev invariably relies on deep researches in archives, introduces a lot of new material into circulation, his innovative research on the history of the Soviet-Polish war of 1920 caused fruitful discussions both in Russia and in Poland, prompting other historians to further research. Gennady Filippovich is the author of the first fundamental biography in Russian of the key statesman of Poland of the 20th century Józef Piƚsudski. Not limited to the problems of Polish history, G.F. Matveev turned to comparative historical research on the material of various Slavic countries, in particular, on the ideology of peasant movements in the period between the two world wars. As an author and editor, he took part in the work on textbooks on the history of the southern and western Slavs. For more than half a century, G.F. Matveev maintains close ties with the Institute of Slavic Studies of the Russian Academy of Sciences, he is a member of the editorial boards of historical journals, both Russian and Polish.
G.F. Matveev talks about his post-war childhood, youth, impressions of his student years, about his work at the Moscow University, about his numerous trips to Poland and more than half a century of communication with Polish colleagues. He also shares his opinion on the current development and prospects of Polish studies in Russia, the possibilities for further dialogue between the two cultures
Tsypkin and Jury–Lee Criteria for Synchronization and Stability of Discrete-Time Multiagent Systems
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Two-sided asymptotic bounds for the complexity of some closed hyperbolic three-manifolds
No full textWe establish two-sided bounds for the complexity of two infinite series of closed orientable 3-dimensional hyperbolic manifolds, the Lobell manifolds and the Fibonacci manifolds
Transfer of a work by e-mail: copyright aspect
No full textE-mail gives the opportunity to send a work of science, literature and art to one or more addressees. Russian copyright law does not allow us to make an unambiguous conclusion about the legitimacy of such use of a work. Purpose: to determine the legal regime of the transfer of works protected by copyright through e-mail. Methods: method of formal logic, systematic structural and formal dogmatic methods are used in the analysis. The article presents two approaches to the problem under consideration. Article 1270 of the Civil Code of the Russian Federation is devoted to the contents of the exclusive copyright. This article establishes an open list of methods to use a work. Accordingly, we can make a logically correct, but legally dubious conclusion that any emailing of a work is illegal. This logic is based on the questionable legal technique of art. 1270 of the Civil Code of the Russian Federation. The author of the paper believes that the second approach is correct. According to this approach, the content of exclusive copyright should be limited to the methods to use a work that is specified in art. 1270. Emailing of a work includes two legally significant actions with such a work: 1) the creation of an electronic copy of a work; 2) sending this copy via the information and telecommunications network as an electronic message to a specific address. The first action is the reproduction of a work. The second action is the communication to the public. The transfer of a work by e-mail is the communication to the public if access to such a work can be obtained by a significant number of persons who do not belong to the usual family circle
A small-gain-theorem-like approach to nonlinear observability via finite capacity channels
No full textThe paper is concerned with observation of discrete-time, nonlinear, deterministic, and maybe chaotic systems via communication channels with finite data rates, with a focus on minimum data-rates needed for various types of observability. With the objective of developing tractable techniques to estimate these rates, the paper discloses benefits from regard to the operational structure of the system in the case where the system is representable as a feedback interconnection of two subsystems with inputs and outputs. To this end, a novel estimation method is elaborated, which is alike in flavor to the celebrated small gain theorem on input-to-output stability. The utility of this approach is demonstrated for general nonlinear time-delay systems by rigorously justifying an experimentally discovered phenomenon: Their topological entropy stays bounded as the delay grows without limits. This is extended on the studied observability rates and appended by constructive finite upper bounds independent of the delay. It is shown that these bounds are asymptotically tight for a time-delay analog of the bouncing ball dynamics. Team Tamas Keviczk
Measurement of the CP-violating phase \phi s in Bs->J/\psi\pi+\pi- decays
No full textMeasurement of the mixing-induced CP-violating phase phi_s in Bs decays is of prime importance in probing new physics. Here 7421 +/- 105 signal events from the dominantly CP-odd final state J/\psi pi+ pi- are selected in 1/fb of pp collision data collected at sqrt{s} = 7 TeV with the LHCb detector. A time-dependent fit to the data yields a value of phi_s=-0.019^{+0.173+0.004}_{-0.174-0.003} rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found
A solution of a problem of Sophus Lie: Normal forms of two-dimensional metrics admitting two projective vector fields
No full textWe give a complete list of normal forms for the two-dimensional metrics that admit a transitive Lie pseudogroup of geodesic-preserving transformations and we show that these normal forms are mutually non-isometric. This solves a problem posed by Sophus Lie. © 2007 Springer-Verlag
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