1989, Number 2

The issue is dedicated to Alexei Ivanovich Kostrikin

Mathematics
	To the 60th anniversary of A. I. Kostrikin		3–4
	The Horrocks theorem for noncommutative rings V. A. Artamonov		5–7
	Subgroups of free Burnside groups of odd composite period S. V. Ivanov		7–11
	On identities in Lie algebras of vector fields A. A. Kirillov		11–13
	Multiplicative matrices in Hopf superalgebras Yu. I. Manin		13–17
	On the representability of finitely generated $PI$-algebras by matrices V. T. Markov		17–20
	Isomorphisms of endomorphism rings of modules that are close to free A. V. Mikhalev		20–27
	Efficient embeddings of countable groups A. Yu. Ol'shanskii		28–34
	Inclusions of varieties that are generated by simple Lie algebras Yu. P. Razmyslov		34–37
	Invertible elements of semirelatives and relatives L. A. Skornyakov		37–40
	Orthogonal decompositions of Lie algebras of the type $A_{p^n-1}$ and $D_n$ with a finite number of classes of similar invariant sublattices D. N. Ivanov		40–43
	Prym varieties of hyperelliptic curves and their applications to nonlinear equations L. V. Katzarkov, D. O. Orlov		43–47
	Maximal singularities on the Fano variety $V_6^3$ A. V. Pukhlikov		47–50
	Simplicity theorems for Lie algebras of derivations of commutative rings S. M. Skryabin		51–54
	The finite basis property of varieties of Lie algebras over a field of characteristic zero L. V. Tsypunov		54–57
	Sandwiches in Lie algebras A. D. Chanyshev		57–59
Mechanics
	Universal characteristic function and the moving frame method in the dynamics of systems with nonintegrable constraints Ya. V. Tatarinov		60–66
	Flow of two-layer axisymmetric jets with preliminary rotation V. E. Epikhin, G. M. Sisoev, V. Ya. Shkadov		67–71
Short notes
	Equivalence under diffeomorphisms of complements to compact sets in Euclidean spaces M. G. Dzhermakyan		72–74
	The completed iterated hyperspace functor R. È. Mirzakhanyan		75–77
	A problem with an oblique derivative in a domain with edges Nguen Tkhan' Nam		77–79
	Weak $p$-points can, but need not be $o$-points S. A. Logunov		79–81
	The differentiability space of a product measure M. U. Khafizov		81–84
	Spectral asymptotics for an eigenvalue problem that is nonlinearly dependent on the parameter Z. E. Tsikhistavi		84–86
	Application of a pseudodifferential operator for estimating the rate of wave propagation in a problem in mechanics A. A. Lokshin, E. A. Sagomonyan		87–89
	On non-sliding conditions of two–legged apparatus at beginning of its motion Т. M. Nguуen		90–94
	Stability of interface between two heavy viscoelastic layers D. V. Georgievskii		94–97
	An estimate for the solution of a degenerate parabolic equation R. Yu. Nabokov		97–99
	Scientific research seminar on algebra		100–102