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1.
K. N. Ponomaryov 《Algebra and Logic》1998,37(6):380-390
The structure of scalar fields for a directly indecomposable finite-dimensional algebra treated as a ring is studied. Scalar
fields are assumed similar if their action on a ring is identical modulo an annihilator. The criterion for a class of maximal
scalar fields to be unique under a similitude relation is established.
Supported by RFFR grant No. 96-01-01675, and by RF State Committee of Higher Education.
Translated fromAlgebra i Logika, Vol. 37, No. 6, pp. 667–686, November–December, 1998. 相似文献
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I. P. Studenyak V. E. Ponomaryov M. Kranj?ec Yu. V. Minets L. M. Suslikov 《Journal of Applied Spectroscopy》2012,79(1):83-86
The effect of anionic substitution of halogen atoms on the spectral position and shape of the optical absorption edge and
the dispersion of the refractive index of crystals of Cu6PS5I1–xClx solid solutions are studied. The concentration dependences of the width of the optical pseudogap, refractive index, and lattice
parameters are shown to be interrelated in these solid solution crystals. 相似文献
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Ivan Khyzhniy Elena Savchenko Sergey Uyutnov Galina Gumenchuk Alexey Ponomaryov Vladimir Bondybey 《Radiation measurements》2010,45(3-6):353-355
Solid nitrogen was investigated by activation spectroscopy methods – thermally stimulated luminescence and thermally stimulated exoelectron emission (TSL and TSEE) in combination with luminescence analysis. TSEE from solid nitrogen pre-irradiated by an electron beam was measured and investigated for the first time. A set of peaks both in TSL and TSEE were observed. It was found that one of the peaks in the TSEE curve is caused by release of electrons in the course of the α-β phase transition of solid nitrogen. The corresponding activation energy was estimated. 相似文献
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I.P. Studenyak M. Kranjčec V.E. Ponomaryov V.V. Panko L.M. Suslikov 《Phase Transitions》2013,86(6):497-502
Cu6PS5I1? ? ? x Cl x mixed crystals were grown using chemical vapour transport. Isoabsorption studies of optical absorption edge and optical polarization measurements were performed in the temperature range 77–320?K. The influence of anionic I?→?Cl substitution on the phase transitions in Cu6PS5I1? ? ? x Cl x mixed crystals is studied. Compositional dependence of the phase-transition temperatures is obtained and the x,T-diagram for Cu6PS5I1? ? ? x Cl x mixed crystals is constructed. 相似文献
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Kalinin VN Rys EG Tyutyunov AA Starikova ZA Korlyukov AA Ol'shevskaya VA Sung DD Ponomaryov AB Petrovskii PV Hey-Hawkins E 《Dalton transactions (Cambridge, England : 2003)》2005,(5):903-908
The first carborane triflates, namely, 1-trifluoromethanesulfonylmethyl-o-carborane (2) and 1,2-bis(trifluoromethanesulfonylmethyl)-o-carborane (7), were obtained in high yields in the reactions of 1-hydroxymethyl-o-carborane (1) or 1,2-bis(hydroxymethyl)-o-carborane (6) with triflic anhydride (Tf2O) in CH2Cl2 in the presence of pyridine. When an excess of pyridine is employed, 1-o-carboranylmethylpyridinium triflate (3), which retains a closo-icosahedral structure, or a pyridinium salt (4) with a zwitterionic nido-dicarbaundecaborate anion are obtained from 1, while the nido compound 8 is formed from 6. The reaction of compound 2 or 7 with excess pyridine also gave 3 or 8, respectively. Compound 2 proved to be a convenient carboranylmethylating agent which reacts with nucleophiles (e.g., potassium phthalimide, PPh3 or KCN) to give the corresponding substitution products N-[(o-carboranyl-1-yl)methyl]phthalimide (9), o-carboranylmethylphosphonium salt 10, and 1-cyanomethyl-o-carborane (11). All compounds were characterized by 1H and 11B NMR spectroscopy. The structures of compounds 4, 7 and 8 were established by X-ray analysis. 相似文献
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K. N. Ponomaryov 《Algebra and Logic》2005,44(3):205-212
In the classical representation of different groups, frequent use is made of a linear automorphism group of various algebras. Since the linear automorphism group is only part of a full automorphism group, such an approach might seem to be too restrictive. In this connection, we point out a natural, wide class of algebras whose automorphisms are standard and are reducible to linear. Thus, for algebras in this class, studying the full automorphism group reduces to treating the linear, a traditional approach in the class of such algebras being quite general.__________Translated from Algebra i Logika, Vol. 44, No. 3, pp. 368–382, May–June, 2005. 相似文献