Mat. Zametki, 2001, Volume 69, Issue 5

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2001, Volume 69, Issue 5

	Groups with Small Centralizers V. A. Antonov, I. A. Tyurina, A. P. Cheskidov	643
	Widths of the Besov Classes $B_{p,\theta}^r(\mathbb T^d)$ È. M. Galeev	656
	Optimal Boundary Control of Steady-State Flow of a Viscous Inhomogeneous Incompressible Fluid A. A. Illarionov	666
	On the Order of Approximation in the Uniform Metric by the Fejér–Zygmund Means on the Classes $E_p[\varepsilon]$ N. A. Il'yasov	679
	On the Solution of a System of Heron Equations S. Sh. Kozhegel'dinov	688
	Comparison of the $L^1$-Norms of Total and Truncated Exponential Sums S. V. Konyagin, M. A. Skopina	699
	Embeddings in Lattice-$O^*$-Groups N. Ya. Medvedev	708
	A Ring Variety without an Independent Basis V. Yu. Popov	713
	Standard Envelopes of Commutative Triple Systems V. T. Filippov	733
	A Solvable Problem for the Stochastic Schrödinger Equation in Two Dimensions A. V. Churkin	740
	Central Limit Theorem for a Class of Nonhomogeneous Random Walks D. A. Yarotskii	751

Mathematical Surveys
	Idempotent Functional Analysis: An Algebraic Approach G. L. Litvinov, V. P. Maslov, G. B. Shpiz	758

Brief Communications
	Number of Components in the Complement to a Level Surface of a Partially Parabolic Polynomial V. N. Karpushkin	798