Izv. Vyssh. Uchebn. Zaved. Mat., 1987, Number 2

JOURNALS // Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika // Archive

1987, Number 2

	On the lattice of varieties of representations of semigroups L. A. Al'shanskiĭ	3
	On the homotopic classification of singular integro-functional operators with shift A. B. Antonevich, M. B. Gankin	9
	The Cauchy problem for infinite linear systems in classes of increasing sequences V. M. Borok, M. Naser	14
	Boundary value problems for a second-order hyperbolic equation in a disk V. P. Burskiĭ	22
	On the set of positive solutions of the Laplace–Beltrami equation on Riemannian manifolds of a special form A. A. Grigor'yan	30
	Singularities of solutions of the first boundary value problem for the heat equation in domains with conical points V. A. Kozlov, V. G. Maz'ya	38
	On some nonclassical orthogonal polynomials A. L. Kuz'mina	47
	Identification in some classes of principal symmetric and interpolation ideals A. A. Mekler	52
	On inverse theorems of Sylow type G. S. Mikaelyan	55
	Application of axiomatic set theory to the theory of extensions of modules S. V. Rychkov	62
	On the polynomial and rational convexity of the union of compact sets in $C^n$ G. Kh. Khudaĭberganov	70

Brief communications
	On a space with projective connection and its subspaces E. T. Ivlev, A. M. Sukhotin	75
	On the existence and uniqueness of the solution of an equation of the nonlinear filtering of jump-like processes V. M. Khametov	78