Sibirsk. Mat. Zh., 1980, Volume 21, Number 5

JOURNALS // Sibirskii Matematicheskii Zhurnal // Archive

1980, Volume 21, Number 5

	Mihail Alekseevich Lavrent'ev (photo)
	Academician Mihail Alekseevich Lavrent'ev (on the occasion of his eightieth birthday)	3
	Probabilities of large deviations in topological spaces. II A. A. Borovkov, A. A. Mogul'skii	12
	On the discrete spectrum of a periodic boundary value problem connected with the study of periodic waveguides V. I. Derguzov	27
	The growth of entire and subharmonic functions on asymptotic curves A. È. Eremenko	39
	A remark on the rigidity of quasiconformal deformations of discrete isometry groups of hyperbolic spaces S. L. Krushkal'	52
	Approximability of finitely presented algebras G. V. Kryazhovskikh	58
	Decomposition of free $l$-groups into an $l$-direct product N. Ya. Medvedev	63
	Necessary conditions in extremal problems for spatial quasiconformal mappings V. I. Semenov	70
	Problem with oblique derivative for the wave equation S. I. Temirbulatov	78
	Finitely generated Kleinian groups in space A. V. Tetenov	88
	Nonrigid analytic surfaces of revolution D. A. Trotsenko	100
	Poorly projective modules A. A. Tuganbaev	109
	Generalized fractional-linear transformations of operator spheres Yu. L. Shmul'yan	114
	Closure operators on a lattice S. L. Èdel'man	132
	Keller’s problem A. V. Yagzhev	141

Notes department
	On the calculation of the sum of values of a polynomial in roots of a nonlinear algebraic system of equations V. A. Bolotov	151
	Constructivizable models of undecidable theories K. Zh. Kudaibergenov	155
	Representation of nilpotent algebras by matrices I. V. L'vov	158
	Metric structure of four-dimensional open analytic manifolds of nonnegative curvature V. B. Marenich	161
	Quasipolynomial zero sets A. L. Ronkin	165
	The connection between the theory of differential games and problems of factorization L. A. Sakhnovich	169
	Mappings that preserve the value of set functions A. V. Shaidenko	173
	An estimate of the domain of convergence and the residue of a multiple Lagrange series for systems of implicit functions A. P. Yuzhakov	176

Abstracts of the Articles Submitted to VINITI
	Аннотации статей, депонированных в ВИНИТИ	180