Vol 23 No 2 (1971) | Ukrains’kyi Matematychnyi Zhurnal

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Published: 23.02.1971

Anniversaries

Mstislav Vsevolodovich Keldysh (On his 60th birthday)

218-220
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Research articles

On the averaging principle for hyperbolic second order equations with a functionally disturbed argument

D. G. Korenevsky

147-156
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The problem of interpolation between factor-spaces

Yu. I. Petunin

157-167
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Reversion of linear operators disturbed on the spectrum

Ya. D. Plotkin, A. F. Turbin

168-176
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On asymptotic representation of solutions for a system of linear partial differential equations with time lag

S. F. Feshchenko, N. I. Shkіl, N. A. Sоtnіchenkо

177-189
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Properties of $\varphi$-transformations of graphs and 2-manifolds

N. P. Khomenko, E. B. Yavorsky

190-200
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Quality in extremal problems

M. M. Tsvetanov

201-217
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Short communications

On application of some modifications of S. A. Chaplygin’s method to Cauchy’s limit problems

I. I. Bezvershenko

221-229
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Solution in finite-difference stating of boundary value problems for one equation of elliptical type

I. M. Velikoivanenko, I. I. Lyashko, G. E. Mistetsky

229-235
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On one method to construct normal in A. N. Tikhonov’s sense of linear equations

V. K. Dzуadуk

235-239
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On weak convergence in the Orlich spaces

B. D. Kotlyar

240-244
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Dynamic systems with peculiar trajectories

N. N. Ladіs

244-248
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On closeness of distributions of two Markovian sums of random variables without a condition of limit neglections

A. N. Litvinov, I. I. Repin

248-253
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On one attribute of solution stability for systems of non-linear differential equations

A. A. Martynyuk

253-257
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On application of the averaging method to the solution of one non-linear integro-differential equation with small parameter of hyperbolic type

T. V. Melіkіdze

257-261
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Determination of unknown parameters under conformal mapping of the upper half-plane on an arbitrary circular quadrangle

L. M. Nepritvorennaya

261-268
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Concerning the demonstration of one theorem of Grunbaum

A. Ya. Petrenyuk

268-269
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Generalized sums for characters and their applications to the reciprocity laws

I. V. Reshetukha

270-276
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Some theorems on stable convexity of closed curves under one-sheeted mappings

N. I. Cherneі

276-280
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Obituaries

Yuri Dmitrievich Sokolov

Yu. A. Mitropolsky, N. S. Kurpel, A.Yu. Luchka, V. N. Shevelo

281
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