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1989, Volume 45, Issue 5  

Algebrogeometric solutions of a boundary-value problem for the nonlinear Schrödinger equation
R. F. Bikbaev, A. R. Its 		3–9
Reduction of the problem of the classification of tubular quadrics to the solving of a system of differential equations of a special form
A. V. Isaev 		10–18
Effective diffusion in the Fokker–Planck equation
S. M. Kozlov 		19–31
Balanced and cobalanced Butler groups
A. A. Kravchenko 		32–37
Reducible variational equations and the perturbation of invariant tori of Hamiltonian systems
S. B. Kuksin 		38–49
Logarithmic asymptotic of rapidly decreasing solutions of Petrovskii hyperbolic equations
V. P. Maslov, M. V. Fedoryuk 		50–62
Asymptotics of the discrete spectrum of the Dirichlet and Neumann problems on the fundamental domain of the crystallographic group
L. B. Parnovskii 		63–69
A lower bound for the number of nodes in the cubature formula for a centrally symmetric integral
G. G. Rasputin 		70–75
Functional homology operations and the weak homotopy type
V. A. Smirnov 		76–86
Exact evaluation of Kolmogorov diameters of finite-dimensional octahedra
A. B. Khodulev 		87–92
Decidability of elementary theories of finitely presented algebras of the variety of algebras defined by the empty system of identities
L. V. Shabunin 		93–102
Semantic characterization of certain sets of intuitionistic logical connectives
A. D. Yashin 		103–113

Brief Communications
Trigonometric integrals that are integrable by the Riemann method
G. G. Gevorkyan 		114–117
On the spectrum of an operator pencil generated by the Dirichlet problem for an elliptic equation at a corner point
V. A. Kozlov 		117–118
Construction of surfaces in the carrying out of gas dynamic calculations
A. S. Shvedov 		119–121
Local ‘homogeneity’ of sets of uniqueness
I. G. Tsar'kov 		121–123
Математические заметки Mathematical Notes
 
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