Mat. Zametki, 1987, Volume 41, Issue 2

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1987, Volume 41, Issue 2

	Matrix relation algebras L. A. Skornyakov		129
	A general theorem on inverse semigroups with finiteness conditions A. Ya. Ovsyannikov		138
	Finiteness of the set of conservative polynomials of given degree A. V. Yagzhev		148
	Coefficients of trigonometric series with nonnegative partial sums A. S. Belov		152
	Sharp constants and extremal functions in inequalities for derivatives A. P. Buslaev		159
	Correction of step functions and summation of their fourier series by the cesáro methods of negative order G. G. Kosheleva		175
	Quasianalytic noncontinuability of a function representable as an exponential series A. F. Leont'ev		185
	Continuity of functions of the classes $V_{\Phi}$ Z. A. Chanturiya		194
	Irregular second-order differential equations with almost-periodic coefficients V. M. Koltyzhenkov		202
	Necessary and sufficient condition for convexity of accessible sets of differential inclusions A. I. Panasyuk		207
	Theorems on the smoothness of the right inverse N. M. Isakov		216
	Smooth lines on projective planes over certain associative algebras M. A. Akivis		227
	Dihedral homologies $A[x]$ and $A[x,x^{-1}]$ and other algebras S. V. Lapin		238
	Isometry group of a generalized Riemannian symmetric space A. E. Tralle		248
	Two extremal problems for Dirichlet–Voronoi domains J. G. Horváth, M. I. Shtogrin		257
	Strongly $\forall$-finite theories of unars B. M. Khusainov		265
	The Hilbert–Kamke problem in analytic number theory A. A. Karatsuba		272