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1.
2.
A generalized linear differential equation in a Banach space is studied. The construction of a phase space and solutions with the help of the spectral theory of linear operators, ergodic theorems, and degenerate semigroups of linear operators is carried out. 相似文献
3.
ZverovichIE ZverovichOI 《高校应用数学学报(英文版)》2004,19(2):125-132
Two new hereditary classes of P5-free graphs where the stability number can be found in polynomial time are proposed. They generalize several known results. 相似文献
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A. F. Rukasov S. P. Épshtein V. P. Tashchi Yu. A. Baskakov Yu. G. Putsykin 《Chemistry of Heterocyclic Compounds》1984,20(3):323-325
The corresponding 4-(O-carbamoylhydroxyamino)imidazolidin-2-ones were obtained by cyclization of O,N-dicarbamoyl derivatives of N-(3-oximino-2-methyl-2-butyl)- and N-(1-oximino-2-cyclohexyl)methylamines in alkaline media. It was shown that the carbamoylation of 1-methyl-4,5-tetramethylene-3-(3,4-dichlorophenyl)-4-hydroxy-aminoimidazolidin-2-one gives, respectively, an O- or N-carbamoyl derivative, depending on whether it is carried out in alkaline or neutral solutions.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 399–401, March, 1984. 相似文献
6.
N. V. Abbakumova Yu. G. Putsykin Yu. A. Baskakov Yu. A. Kondrat'ev 《Chemistry of Heterocyclic Compounds》1981,17(9):948-950
A new example of the Dimroth rearrangement in which 4-amino-1H-quinazolin-2-one 3(N)-oxide undergoes isomerization to 4-oximino-1H, 3H-quinazolin-2-one was observed. It is shown that the thermal cyclization of N-(2-amidoximophenyl)ureas and carbamates leads to the production of 4-amino-1H-quinazolin-2-one 3(N)-oxides, while their O-carbamoyl derivatives give 4-oximino-1H, 3H-quinazolin-2-one and 5-oxo-2-1,2,4-oxadiazolino[c3,4]-1H,3H-quinazolin-2-one.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1264–1266, September, 1981. 相似文献
7.
V. P. Tashchi T. I. Rukasov Yu. G. Orlova Yu. A. Putsykin Yu. A. Baskakov 《Chemistry of Heterocyclic Compounds》1982,18(6):566-568
2-(-Oximinoethyl)-2-methylthiirane was obtained by the reaction of 3,4-dibromo-3-methyl-2-butanone oxime with sodium sulfide. At the same time, the O-carbamoyl derivative of the ,-dibromo oxime was converted to the corresponding substituted ,-unsaturated oxime under the same conditions. Thiirane oxime, like its O-carbamoyl derivative, underwent the desulfuration that is characteristic for thirranes under the influence of tributylphosphine.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 751–753, June, 1982. 相似文献
8.
In the 2500-8500 cm(-1) region several strong emission bands of (40)ArH were observed by Fourier transform spectroscopy through a dc glow discharge in a mixture of argon and hydrogen. Rotational-electronic transitions of the two previously unstudied 4p-5s and 5p-6s,v = 0-0, bands of (40)ArH were measured and assigned in the 6060 and 3770 cm(-1) regions, respectively. A simultaneous fit of the emission transitions of the 4p-5s and 5p-6s bands and an extended set of transitions of the 6s-4p band observed by Dabrowski, Tokaryk, and Watson [J. Mol. Spectrosc. 189, 95 (1998)] and remeasured in the present work yielded consistent values of the spectroscopic parameters of the electronic states under investigation. In the branch of the 4p-5s band with transitions of type (Q)Q(f(3)e) we observed a narrowing in the linewidths with increasing rotational quantum number N. The rotational dependence of the linewidth is caused by predissociation of the 5s state by the repulsive ground 4s state through homogeneous coupling and changes in overlap integrals of the vibrational wave functions with the rotational level. Analysis was based on the Fermi's golden rule approximation model. In the 4p-5s band region a vibrational sequence ofv(')-v(")=1-1, 2-2, and 3-3 were recorded and a number of transitions belonging to the strongest (Q)Q(f(3)e) form branch of the 1-1 band were analyzed. 相似文献
9.
The synthesis of 2-alkyl(dialkyl)amino-4-chloro-sym-triazine derivatives of hydroxylamine, N-methylhydroxylamine, and N-phenylhydroxylamine has been effected and their properties have been studied. The thermal and catalytic polycondensation of the 2-alkyl(dialkyl)amino-4-chloro-6-N-phenyl(methyl)hydroxyamino-sym-triazines accompanied by the liberation of hydrogen chloride and the formation of linear polycondensates with 3–4 members has been observed.For part IX see [9]. 相似文献