Kazan state Federal University E-Archive :: Browsing by Author "Gumerov R."

Approximation by matrices with simple spectra

Gumerov R.; Vidunov S. (2016)

© 2016, Pleiades Publishing, Ltd.This note deals with a problem on approximation of a matrix tuple by a finite family of diagonalizable matrices with simple eigenvalues. In addition, for a given tuple of matrix functions, ...

Characters and coverings of compact groups

Gumerov R. (2014)

We consider characters and finite-sheeted coverings of compact connected Abelian groups and prove analytic and algebraic properties of characters. As an application of these results, we show that the character group of a ...

Confirmation of the Sublimation Activity of the Primitive Main-Belt Asteroids 779 Nina, 704 Interamnia, and 145 Adeona, as well as its Probable Spectral Signs on 51 Nemausa and 65 Cybele

Busarev V.; Shcherbina M.; Barabanov S.; Irsmambetova T.; Kokhirova G.; Khamroev U.; Khamitov I.; Bikmaev I.; Gumerov R.; Irtuganov E.; Mel’nikov S. (2019)

© 2019, Pleiades Publishing, Inc. Abstract: This paper presents the results that confirm the sublimation activity at the perihelion of the primitive main-belt asteroids 779 Nina, 704 Interamnia, and 145 Adeona; this activity ...

Double-wedged Wollaston-type polarimeter design and integration to RTT150-TFOSC; initial tests, calibration, and characteristics

Helhel S.; Khamitov I.; Kahya G.; Bayar C.; Kaynar S.; Gumerov R. (2015)

© 2015, Springer Science+Business Media Dordrecht. Photometric and spectroscopic observation capabilities of 1.5-m Russian–Turkish Telescope RTT150 has been broadened with the integration of presented polarimeter. The ...

Education psychology driven technologies to manage socially important skills building in academic physical education and sport service

Semenov S.; Morozov A.; Denisenko Y.; Gumerov R. (2019)

© 2018, Teoriya i praktika fizicheskoy kul'tury i sporta. All rights reserved. The article analyzes benefits of the education psychology driven technologies to manage socially important skills building in the academic ...

Group structure in finite coverings of compact solenoidal groups

Grigorian S.; Gumerov R.; Kazantsev A. (2000)

Let p : X → G be an n - fold covering of a compact solenoidal group G by a connected topological space X. We prove that there exists a group structure in X turning p into a homomorphism between compact abelian groups.

Inductive Limits for Systems of Toeplitz Algebras

Gumerov R. (2019)

© 2019, Pleiades Publishing, Ltd. By the Toeplitz algebra we mean the reduced semigroup C*-algebra for the additive semigroup of non-negative integers. This article deals with inductive systems of Toeplitz algebras over ...

On a covering group theorem and its applications

Grigorian S.; Gumerov R. (2002)

Let p: X → G be an n-fold covering of a compact group G by a connected topological space X. Then there exists a group structure in X turning p into a homomorphism between compact groups. As an application, we describe all ...

On a Topology and Limits for Inductive Systems of C <sup>∗</sup> -Algebras over Partially Ordered Sets

Gumerov R.; Lipacheva E.; Grigoryan T. (2019)

© 2019, Springer Science+Business Media, LLC, part of Springer Nature. Motivated by algebraic quantum field theory and our previous work we study properties of inductive systems of C ∗ -algebras over arbitrary partially ...

On finite-sheeted covering mappings onto solenoids

Gumerov R. (2005)

We study limit mappings from a solenoid onto itself. It is shown that each equivalence class of finite-sheeted covering mappings from connected topological spaces onto a solenoid is determined by a limit mapping. Properties ...

On Inductive Limits for Systems of C*-Algebras

Gumerov R.; Lipacheva E.; Grigoryan T. (2018)

© 2018, Allerton Press, Inc. We consider a covariant functor from the category of an arbitrary partially ordered set into the category of C*-algebras and their *-homomorphisms. In this case one has inductive systems of ...

On norms of operators generated by shift transformations arising in signal and image processing on meshes supplied with semigroup structures

Gumerov R. (2016)

© Published under licence by IOP Publishing Ltd.Shift transformations and linear operators generated by shifts have a number of applications in signal and image processing. This note is concerned with a problem which has ...

On the existence of means on solenoids

Gumerov R. (2005)

A mean on a topological space is a continuous idempotent and symmetric operation on it. A proof of a criterion for the existence of means on solenoids is given.

On the structure of finite coverings of compact connected groups

Grigorian S.; Gumerov R. (2006)

Finite-sheeted covering mappings onto compact connected groups are studied. We show that for a covering mapping from a connected Hausdorff topological space onto a compact (in general, non-abelian) group there exists a ...

Optical counterpart positions of extragalactic radio sources and connecting optical and radio reference frames

Aslan Z.; Gumerov R.; Jin W.; Khamitov I.; Maigurova N.; Pinigin G.; Tang Z.; Wang S. (2010)

We discuss the results of an investigation of astrometric positions of extragalactic radio sources from a list for the International Celestial Reference Frame. About 300 fields around extragalactic radio sources were ...

Photometry of artificial airglow emission of the ionosphere stimulated by "Sura" facility radiation

Gumerov R.; Nasyrov I.; Kulikov D.; Kogogin D.; Grach S. (2017)

© 2017 IEEE. A photometric instrument based on the photon - counting is described in the paper. Some experimental results of photometric measurements of artificial airglow at 557.7 nm (green line) and 427.8 nm (blue line) ...

Position observations of NEAs at the RTT150

Ivantsov A.; Aslan Z.; Gumerov R.; Hudkova L.; Khamitov I.; Pinigin G. (2008)

In 2004-2007, 560 observations of 17 Near-Earth Asteroids of 15-21 magnitudes were made at the Russian-Turkish telescope (RTT150). The reduction was made using reference stars from the UCAC2 and USNO-B1 catalogues. The ...

Preliminary results of the alignment and Hartmann tests of the AZT-22 telescope

Aslan Z.; Bikmaev I.; Vitrichenko E.; Gumerov R.; Dembo L.; Kamus S.; Keskin V.; Kiziloglu U.; Pavlinsky M.; Panteleev L.; Sakhibullin N.; Selam S.; Sunyaev R.; Khamitov I.; Yaskovich A. (2001)

The AZT-22 telescope installed in Turkey (Antalia) was aligned and tested on stars by the Hartmann method. The rms normal deviation of an equivalent optical system is 0.040 ± 0.016 μm. The circle of confusion is 0.40 ± ...

Results of observations of asteroids at the Russian–Turkish RTT-150 telescope from 2004–2013

Gumerov R.; Khamitov I.; Hudkova L.; Maigurova N.; Pinigin G.; Kochetova O.; Chernetenko Y.; Aslan Z.; Pomazan A.; Kryuchkovskiy V. (2015)

© 2015, Allerton Press, Inc. We report the results of analysis of the data volume containing 13834 topocentric positions of 231 asteroids obtained from observations at the Russian–Turkish RTT-150 telescope (TÜBITAK (Scientific ...

Simultaneous observations of the 557.7 nm airglow and stimulated electromagnetic emission during HF pumping of the ionosphere with diagnostic schedule: First results

Grach S.; Sergeev E.; Nasyrov A.; Gumerov R.; Shaimukhametov R.; Nasyrov I.; Komrakov G. (2004)

The first results on simultaneous observation for artificial airglow emission at 557.7 nm (green line) and stimulated electromagnetic emission (SEE) during HF pumping of the ionosphere with specially designed HF pulsing ...

Browsing by Author "Gumerov R."

Browsing by Author "Gumerov R."

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