Izv. Akad. Nauk SSSR Ser. Mat., 1967, Volume 31, Issue 5

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1967, Volume 31, Issue 5

	Editorial		955
	Half-isomorphisms of cancellative semigroups L. N. Shevrin		957
	On inverse Sturm–Liouville problems on a finite segment V. V. Zhikov		965
	Isolation of singularities of the Green's function Yu. P. Krasovskii		977
	On asymptotically best lacunary systems V. F. Gaposhkin		1011
	The principle of locality in the theory of boundary-value problems for partial differential equations. I K. K. Golovkin		1027
	The additive theory of ideals in systems with residuals V. A. Andrunakievich, Yu. M. Ryabukhin		1057
	On an invariant of open manifolds V. L. Golo		1091
	A geometrical conjecture of Banach M. L. Gromov		1105
	On free polynilpotent groups A. L. Shmel'kin		1115
	Lebesgue constants of linear methods of summability for Fourier series G. A. Fomin		1133
	Sylow $p$-subgroups of the general linear group over a skew field A. E. Zalesskii		1149
	Uniqueness classes for solutions of the Cauchy problem for linear equations with rapidly increasing coefficients Ya. I. Zhitomirskii		1159
	The solution of the first boundary-value problem for self-adjoint elliptic equations in the case of an unbounded region L. D. Kudryavtsev		1179