Mat. Zametki, 1991, Volume 49, Issue 1

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1991, Volume 49, Issue 1

	Problems of combinatorial optimization, statistical sums and representations of the full linear group A. I. Barvinok	3–11
	Two extremal problems for trigonometric polynomials with a prescribed number of harmonics È. S. Belinskii	12–18
	On the number of real and complex moduli of singularities of smooth functions and realizations of matroids V. A. Vassiliev, V. V. Serganova	19–27
	Estimation of maximal and minimal divergence of neighboring points in Chebyshev's alternant V. G. Verdiev	28–39
	A new direct method for solving integral equations of the third kind N. S. Gabbasov	40–46
	Equivalence in $L_p[0,1]$ of the system $e^{i2\pi kx}$ $(k=0,\pm1,\dots)$ and the system of the eigenfunctions of an ordinary functional-differential operator A. M. Gomilko, G. V. Radzievskii	47–55
	Behavior of solutions of elliptical boundary problems at an angle V. A. Kozlov	56–62
	Noether theory of unbounded singular integral operators with a Carleman shift V. G. Kravchenko, G. S. Litvinchuk	63–69
	Supercanonical algebras and Schouten brackets I. S. Krasil'shchik	70–76
	Invertibility of abstract dual operators in Hilbert spaces A. È. Pasenchuk	77–83
	Existence of identities in the restricted enveloping algebra V. M. Petrogradsky	84–93
	Nonlocal finite dimensional reductions in variational boundary value problems Yu. I. Sapronov	94–103
	Homology of symmetric products V. A. Smirnov	104–113
	Stability estimates in inverse problems for hyperbolic equations A. Khaidarov	114–119
	On homogeneities of hyperspaces of dyadic bicompacta L. B. Shapiro	120–126
	Polynomial hull of a sphere imbedded in $C^2$ N. V. Shcherbina	127–134
	On a quadratic functional in a nonlocal boundary value problem for the heat equation V. V. Shelukhin	135–143

Brief Communications
	Estimates of the solutions of elliptic equations with unbounded operator coefficients in a Hölder space V. P. Anosov	144–146
	Point transformations and linearizability of second-order ordinary differential equations V. N. Gusyatnikova, V. A. Yumaguzhin	146–148
	Optimal quadrature formulas for classes of functions with bounded mixed difference V. V. Dubinin	149–151
	Sufficient condition for stability of invariant cones of any codimension in Euclidean space $R^N$ A. O. Ivanov	151–153
	Conditions for the completeness of a certain system of entire functions and their applications to the Pomme operators N. I. Nagnibida	154–156

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