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1989, Volume 45, Issue 2  


Stationary phase method for a saddle point near the boundary of the domain of integration
V. A. Borovikov
3
Ultrasequential spaces
N. V. Velichko
15
Some properties of uniformly upper-right semicontinuous functions and application to differential equations
R. I. Kozlov
22
Extension of infinitesimal bendings of surfaces to analytic bendings under external constraints
V. T. Fomenko, E. M. Kolegaeva
30
Differential properties of the operator of best approximation by rational fractions
A. V. Kolushov
40
Differential properties on the boundary of functions that are holomorphic in the unit ball in $C^N$
V. G. Krotov
51
Generalized derivative in an arbitrary domain
L. A. Leont'eva
60
A relationship between certain sums over trivial and nontrivial zeros of the Riemann zeta-function
Yu. V. Matiyasevich
65
Integrality of the group ring of an almost solvable torsion-free subgroup of $GL_n(Q)$
G. A. Noskov
71
Classes of recursively enumerable sets and $Q$-reducibility
R. Sh. Omanadze
79
Homomorphisms of linear groups over rings
V. M. Petechuk
83
Strongly optical lagrangian manifolds
L. V. Polterovich
95
A sufficient condition for the bernoulli property for $K$-systems and its application to classical statistical mechanics
M. R. Soloveichik
105
One characteristic property of the commutator subgroup of a painted braid group
V. K. Shalashov
113
Compact perturbations of strongly damped operator pencils
A. A. Shkalikov, V. T. Pliev
118
An example of two pseudoconvex domains that are not separated by a levi-flat hypersurface
N. V. Shcherbina
129

Brief Communications
Parallelepipeds of least volume that contain a convex body
B. S. Kashin
134
Universal rulers
S. V. Konyagin, A. P. Savin
136
Properties of the operators of classical potential theory
V. V. Dyakin, V. Ya. Raevskii
138
Математические заметки Mathematical Notes
 
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