Mat. Zametki, 1987, Volume 41, Issue 1

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1987, Volume 41, Issue 1

	Jointly extremal manifolds É. I. Kovalevskaya		3
	Automorphism groups of metabelian groups G. A. Noskov		9
	Approximation of functions by the Fourier–Walsh sums S. P. Baiborodov		23
	Inversion of potentials in $\mathbf{R}^n$ with the aid of Gauss–Weierstrass integrals B. S. Rubin		34
	Jackson's theorems in $L_2$ V. A. Yudin		43
	Linear irreducibility of one form of differential equations V. V. Kazakov		48
	Equiconvergence of the Riesz means of expansions, corresponding to an $N$-fold system of exponents and to the $N$-fold fourier integral Ya. Sh. Salimov		57
	Approximation of the attainability set for a controlled process M. S. Nikol'skii		71
	The complexity of the realization of subdefinite matrices by gate schemes A. E. Andreev		77
	Multiplicative spectra that are torsion-free in their homology groups V. V. Vershinin, V. G. Gorbunov		87
	A multiplicative normal functor is a power functor M. M. Zarichnyi		93
	An oriented graph connected with an ordered pair of ordered partitions L. M. Koganov		101
	Central limit theorem for weakly dependent variables N. K. Bakirov		104
	Some boundary-value problems for generalized differential equations Yu. A. Rozanov		110