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1.
Interpolation with lagrange polynomials a simple proof of Markov inequality and some of its generalizations 总被引:1,自引:0,他引:1
The following theorem is provedTheorem 1.Let q be a polynomial of degree n(qP_n)with n distinct zeroes lying inthe interval[-1,1] and△'_q={-1}∪{τ_i:q'(τ_i)=0,i=1,n-1}∪{1}.If polynomial pP_n satisfies the inequalitythen for each k=1,n and any x[-1,1]its k-th derivative satisfies the inequality丨p~(k)(x)丨≤max{丨q~((k))(x)丨,丨1/k(x~2-1)q~(k+1)(x)+xq~((k))(x)丨}.This estimate leads to the Markov inequality for the higher order derivatives ofpolynomials if we set q=T_n,where Tn is Chebyshev polynomial least deviated from zero.Some other results are established which gives evidence to the conjecture that under theconditions of Theorem 1 the inequality ‖p~((k))‖≤‖q~(k)‖holds. 相似文献
2.
Goncharuk I. N. Ilinskiy A. V. Kvashenkina O. E. Shadrin E. B. 《Physics of the Solid State》2013,55(1):164-174
Physics of the Solid State - It has been shown that, in single crystals and films of a strongly correlated material, namely, vanadium dioxide, upon a thermally stimulated phase transition from the... 相似文献
3.
E. V. Babaev Y. I. Koval V. B. Rybakov E. G. Paronikyan G. M. Stepanyan R. G. Paronikyan Sh. Sh. Dashyan S. A. Rzhevskii I. A. Shadrin 《Russian Chemical Bulletin》2018,67(2):313-320
The alkylation (allylation and propargylation) of 3-cyano-6-dialkylamino-2-pyridones containing a d-annulated ring occurs at the oxygen atom. The structures of the starting compounds and their alkylation products were determined by X-ray diffraction. The neurotropic and antimicrobial activity of alkylation products was examined. 相似文献
4.
Physics of the Solid State - The energy spectra of carbon nanotubes with chiralities (5, 5) and (10, 0) have been calculated in terms of the Schubin-Wonsowskii-Hubbard model. It has been shown... 相似文献
5.
Il’inskii A. V. Kastro R. A. Pashkevich M. E. Shadrin E. B. 《Technical Physics》2019,64(12):1790-1795
Technical Physics - We have analyzed the dielectric spectra of thin (1200 Å) films of vanadium dioxide, a material with strong electron–electron correlations. We have tested both undoped... 相似文献
6.
Y. M. Kulyako S. A. Perevalov T. I. Trofimov D. A. Malikov S. E. Vinokurov M. D. Samsonov B. F. Myasoedov A. M. Fedoseev A. A. Bessonov A. Y. Shadrin 《Journal of Radioanalytical and Nuclear Chemistry》2014,299(3):1293-1298
It was established that heating to 90 °C of nitrate solutions of U, Np and Pu in the presence of hydrazine hydrate results in the formation of hydrated dioxides of these elements. On ignition under inert or reducing conditions in the temperature range of 280–800 °C hydrated uranium dioxide transmogrify into crystalline UO2. On ignition in air atmosphere UO2·nH2O turns into UO3 at 440 °C and into U3O8 at 570–800 °C. It was shown that thermolysis of the solution containing a mixture of uranium, neptunium and plutonium nitrates at 90 °C in the presence of hydrazine hydrate allows one to prepare hydrated dioxides (U, Np, Pu)O2·nH2O which on heating to ~300 °C transmogrify into crystalline product of UO2, NpO2 and PuO2 solid solution. The technique of preparation of solid solutions of U and Pu dioxides is very promising as simple and effective method of production of MOX-fuel for. 相似文献
7.
8.
We study double Hurwitz numbers in genus zero counting the number of covers CP1→CP1 with two branching points with a given branching behavior. By the recent result due to Goulden, Jackson and Vakil, these numbers are piecewise polynomials in the multiplicities of the preimages of the branching points. We describe the partition of the parameter space into polynomiality domains, called chambers, and provide an expression for the difference of two such polynomials for two neighboring chambers. Besides, we provide an explicit formula for the polynomial in a certain chamber called totally negative, which enables us to calculate double Hurwitz numbers in any given chamber as the polynomial for the totally negative chamber plus the sum of the differences between the neighboring polynomials along a path connecting the totally negative chamber with the given one. 相似文献
9.
10.
A. M. Petrzhik G. A. Ovsyannikov A. V. Shadrin K. I. Konstantinyan A. V. Zaitsev V. V. Demidov Yu. V. Kislinskii 《Journal of Experimental and Theoretical Physics》2011,112(6):1042-1050
Hybrid herostructures comprising an YBa2Cu3O
x
(YBCO) high-temperature superconductor (HTS) layer and Nb/Au low-temperature superconductor (LTS) bilayer (with critical
HTS and LTS temperatures T
c and T′c, respectively), separated by a thin (d
M = 5–20 nm) interlayer of LaMnO3, La0.7Ca0.3MnO3, or La0.7Sr0.3MnO3 manganite have been studied. The electric resistance and magnetic properties of individual (evaporated directly onto the
substrate) manganite films and related hybrid herostructures have been measured. Based on quasi-classical equations, analytical
expressions for the conductivity of herostructures at T ≤ T′c are obtained in the case of a low-transparency superconductor/manganite interface. It is established that the conductivity
of heterostructures is determined by the proximity effect (related to the penetration of a condensate wavefunction from the
Nb/Au bilayer to manganite) and depends strongly on interface transparency. At low temperatures (T ≪ T
c′), the conductivity peaks are found at voltages determined by the exchange field of the manganite interlayer. At T
c′ < T < T
c, conductivity features at nearly zero bias voltages are observed, which are related to the superconductivity of the YBCO
electrode. 相似文献