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Finite Minimal non-supersolvable Groups Decomposable into the Product of Two normal supersolvable subgroups

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Communications in Mathematics and statistics 2015年第2期3卷 285-290页

作者： Wenbin Guo a.s.kondrat’ev Department of Mathematics University of Science and Technology of ChinaHefei 230026People’s Republic of China n.n.Krasovskii Institute of Mathematics and Mechanics of UB RAs Ekaterinburg 620990Russia Ural Federal University Ekaterinburg 620002Russia

In this paper,we determine the finite minimal non-supersolvable groups decomposable into the product of two normal supersolvable subgroups.

关键词： Finite group supersolvable group Minimal non-supersolvable group Minimal non-p-supersolvable group

Recognition by spectrum of the groups 2~D_(2m+1)(3)

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science China Mathematics 2009年第2期52卷 293-300页

作者： kondrat’ev A. s. Institute of Mathematics and Mechanics Ural Branch of the Russian Academy of SciencesEkaterinburg 620219Russia

It is proved that a finite group with the same set of element orders as the simple group 2~D_(2m+1)(3) is isomorphic to 2~D_(2m+1)(3).

关键词： finite group finite simple group spectrum prime graph recognizability by spectrum

On a Question of the Theory of Partially Composition Formations（Dedicated to Professor K.P. shum on the occasion of his 70th birthday）

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Algebra Colloquium 2014年第3期21卷 437-447页

作者： A.A. Tsarev n.n. Vorob'ev Department of Mathematics P.M. Masherov Vitebsk State University Vitebsk 210038 Belarus Department of Mathematics F. Skorina Gomel State University Gomel' 246019 Belarus

Let n 〉 0 and w be a non-empty set of primes. It is proved that the lattice of all τ-closed n-multiply ω-composition formations is inductive. It gives a positive answer to a question of skiba asked in 2001 at the G... 详细信息

关键词： finite group formation of groups ω-composition satellite of formation,τ -closed n-multiply ω-composition formation inductive lattice of formations

Factorizations of Fitting classes

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Frontiers of Mathematics in China 2012年第5期7卷 943-954页

作者： nanying YAnG Wenbin GUO n.T. VOROB'ev school of Mathematics University of Science and Technology of China Hefei 230026 China Department of Mathematics Vitebsk State University Vitebsk 210038 Belarus

In this paper, we prove that there exists a infinite set of non-trivial local Fitting classes every element in which is decomposable as a non-trivial product of Fitting classes such that every factor in the product is neither local nor a formation. In particular, this gives a positive answer to Problem 11.25 a） in The Kourovka notebook.

关键词： Fitting class normal Fitting class semilocal Fitting class Lockett class

On the Cover-Avoid Property of Injectors for Hartley Classes

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Algebra Colloquium 2015年第2期22卷 211-214页

作者： Yufeng Liu Xiaolan Yi n.T. Vorob'ev school of Mathematics and Informational scienceshandong Institute of Business and Technology Yantai Shandong 264005 China Department of Mathematics Zhejiang Sci-Tech University Hangzhou Zhejiang 310018 China Department of Mathematics Masherov Vitebsk State University Vitebsk 210038 Belarus

In this paper, we study the cover-avoid property of -injectors on chief factors of a group G for a Fitting class in some universe with partial solubility.

关键词： Fitting class Hartley class -injector cover-avoid property chief factor

On Injectors of a Hartley set of a Finite Group

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Algebra Colloquium 2018年第4期25卷 671-680页

作者： nanying Yang n.T.Vorob'ev T.B.Vasilevich school of science Jiangnan UniversityWuxiJiangsu 214122China Department of Mathematics Masherov Vitebsk State University

Let G be a finite group andНbe a Hartley set of *** this paper,we prove the existence and conjugacy ofН-injectors of G and describe the characterization of injectors via *** applications,some known results are direc... 详细信息

关键词： Hartley set injector h-radical H-function

Research agenda for the Russian Far East and utilization of multiplatform comprehensive environmental observations

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International Journal of Digital Earth 2021年第3期14卷 311-337页

作者： Tuukka Petäjä Kirill s.Ganzei Hanna K.Lappalainen Ksenia Tabakova Risto Makkonen Jouni Räisänen sergey Chalov Markku Kulmala sergej Zilitinkevich Petr Ya Baklanov Renat B.shakirov natalia V.Mishina evgeny G.Egidarev Igor I.kondrat’ev Institute for Atmospheric and Earth system Research/Physics Faculty of ScienceUniversity of HelsinkiHelsinkiFinland Department of Cryosphere Tyumen State University TyumenRussia Pacific Geographical Institute of the Far Eastern Branch of Russian Academy of sciences VladivostokRussia Finnish Meteorological Institute HelsinkiFinland Faculty of Geography Lomonosov Moscow State UniversityMoscowRussia V.I.Ilyichov Pacific Oceanological Institute of the Far Eastern Branch of Russian Academy of sciences VladivostokRussia

The Russian Far East is a region between China and the Russian Arctic with a diverse climatological,geophysical,oceanic,and economical *** southern region is located in the Far East monsoon sector,while the northern parts are affected by the Arctic Ocean and cold air masses penetrating far to the *** economic activities and traffic connected to the China Belt and Road Initiative together with climate change are placing an increased pressure upon the Russian Far East *** is an urgent need to improve the capacity to measure the atmospheric and environmental pollution and analyze their sources and to quantify the relative roles of local and transported pollution emissions in the *** the paper,we characterize the current environmental and socio-economical landscape of the Russian Far East and summarize the future climate scenarios and identify the key regional research *** discuss the research infrastructure concept,which is needed to answer the identified research *** integrated observations,filling in the critical observational gap at the northern Eurasian context,are required to provide state-of-the-art observations and enable follow-up procedures that support local,regional,and global decision making in the environmental context.

关键词： Russian Far East greenhouse gases aerosol particles insitu observations Earth observation data

synthesis,structure and magnetic properties of sm_(1.2)Ho_(0.8)Fe_(17)Hx(X=0;4.4)

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Journal of Rare Earths 2021年第9期39卷 1089-1094页

作者： s.V.Veselova M.A.Paukov I.s.Tereshina V.n.Verbetsky K.V.Zakharov D.I.Gorbunov A.n.VasiPev Faculty of Physics M.V.Lomonosov Moscow State UniversityMoscow 119991Russia nuclear Fuel Cycle Department.Centrum Vyzkumu Rez Hlavni 130Husinec-Rez 25068.Czech Republic Immanuel Kant Baltic Federal University Kaliningrad 236004Russia Faculty of Mathematics and Physics Charles UniversityPrague 12116Czech Republic Hochfeld-Magnetlabor Dresden(HLD-EMFL) Helmholtz-Zentrum Dresden-RossendorfDresden 07328Germany f National Research South Ural State UniversityChelyabinsk 454080Russia

Intermetallic compounds based on rare-earth metals and iron are by far the most promising materials for permanent mag *** this work,the multicomponent compound sm_(1.2)Ho_(0.8)Fe_(17)was prepared by in duction *** hydride sm_(1.2)Ho_(0.8)Fe_(17)H_(4.4)with a high hydrogen content was obtained by direct hydrogenation of the intermetallic *** rhombohedral Th2Zn17-type of structure(space group R3^(-)m)is inhere nt to parent compound and hydride as *** effect of hydrogenation on the magneric properties of sm_(1.2)Ho_(0.8)Fe_(17)was *** temperature of the hydride sm_(1.2)Ho_(0.8)-Fe_(17)H_(4.4)is higher than that of parent compound by△Tc=138 *** hydrogen embedded in sm_(1.2)Ho_(0.8)Fe_(17)crystal lattice in creases the saturation magnetization(σs)at T=300 K,but does not significantly affect%at T=4.2 *** ferrimagnetic structure is retained in magnetic fields up to 58 T in the parent compound,while,in the hydride,there is a spin-reorie ntatio n phase transitio n observed at 55 *** is found that the parameter of the in tersublattice exchange interaction decreases significantly in the hydride sm_(1.2)Ho_(0.8)Fe_(17)Hg_(4.4)(and in the nitride sm_(1.2)Ho_(0.8)Fe_(17)n_(2.4))which is associated with boosting of the unit-cell volume and distances between magnetic ions.

关键词： Intermetallic compound Hydride Crystal structure Magnetization Magnetic phase transition Exchange interaction

structural and photoluminescence properties of La3+ doped CdO nanophosphors synthesised via green mediated solution combustion route

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Journal of Rare Earths 2019年第9期37卷 916-923,I0001页

作者： M.s. Geetha H.n. shivananjaiah Vijaya Composite College Bangalore560 003India Government science College Nrupatunga RoadBangalore 560 001India

This paper reports a facile environmentally safe green combustion synthesis method of La3+doped CdO nanoparticles(nPs)using different concentrations of Aloe vera(A.V)gel as combustible *** crystallite size obtained using PXRD pattern is found to be 12-22 *** structural analysis was further analysed by Rietveld refinement *** X-ray photoelectron spectroscopy(XPs)analysis reveals the presence of two electronic states of CdO around 400 and 411 ev attributed to Cd 3 d3/2 and 3 d3/2,*** photoluminescence(PL)studies were carried upon 350 nm excitation *** PL emission spectra are found to have two prominent peaks centered at 410 and 510 nm and are attributed to 5D3→7F1 and 5D1→7F0 transitions,*** Commission International de l’Eclairage(CIE)chromaticity diagram reveals blue-green color *** correlation color temperature(CCT)value is found to be around^9793 *** obtained results suggest that the product is quite useful for cool light emitting diode applications when doping concentration is 2 mol%.

关键词： Green synthesis nanostructures Photoluminescence Judd-ofelt Rare earths CdO