Izv. Akad. Nauk SSSR Ser. Mat., 1981, Volume 45, Issue 4

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1981, Volume 45, Issue 4

	On the linear nature of the behavior of Iwasawa's $\mu$ invariant V. A. Babaitsev		691
	Toroidal Fano 3-folds V. V. Batyrev		704
	On $G$-compactness of a class of nondivergence elliptic operators of second order V. V. Zhikov, M. M. Sirazhudinov		718
	On controlled diffusion processes with unbounded coefficients N. V. Krylov		734
	On the distribution of fractional parts and Benford's law A. I. Pavlov		760
	Class numbers in the genus of quadratic forms, and algebraic groups A. S. Rapinchuk		775
	On algebraic cycles on simple 5-dimensional Abelian varieties S. G. Tankeev		793
	A local invariant of a Riemannian manifold A. N. Tyurin		824
	A finitely presented solvable group with unsolvable word problem O. G. Kharlampovich		852
	The Levi form for $C^1$-smooth hypersurfaces, and the complex structure on the boundary of domains of holomorphy N. V. Shcherbina		874
	Envelopes of holomorphy of some tube sets in $\mathbf C^2$ and the monodromy theorem S. M. Ivashkovich		896
	$k$-snakes as a generalization of polynomials deviating least from zero under constraints V. V. Kovtunets		905