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## BASM n.1 (1), 1990

Research Paper Short Communications P-Regular Rings and P-Flat Modules. (Russian)Andrunakievich A. V., Andrunakievich V. A. pp.5-12 On the Works of I.F.Sakrier on the Theory of Probability and its Application. (Russian) Dragalin V. P., Lyakhu A. K. pp.13-17 The Conditions of the Qualitative Portraits Existence with the centres of Full Quadratic System with $I_9\ne 0$. (Russian) Calin Iurie, Sibirsky K. S. pp.17-26 On a Topological Characterization and the Universality of the Space $\beta N \setminus N$. (Russian) Parovichenko I. I. pp.26-30 Invariant Processes of a Differential System and the Conditions for the Existence of a Homogeneous Linear Partucular Integral. (Russian) Popa Mihail pp.30-43 On the Embedding of Planar Graphs in Hypercubes. (Russian) Prisakari K. F., Soltan P. S., Chepoi V. D. pp.43-50 A Mathematical Model for the Circular Routes Construction. (Russian) Solomon D. I. pp.50-55 The Solution of the Problem of the Electroelastic Wave Dispersion in a Piezoceramic Bar. (Russian) Cheban V. G., Fornya G. A. pp.55-59 On the Splitting of the Radical in Commutative Topological Rings Which are Nearly Compact. (Russian) Ursul M. I. pp.59-64 Weber's Problem on the Median Graphs. (Russian) Zambitsky D. K. pp.65-67 On the Amount of Comitants which Determine the Number of Integral Lines of the Cubic Differential System. (Russian) Popa Mihail pp.67-69 On the Impossibility of an Algorithm for the Recognition of the Expressibility of Modal Formulae. (Russian) Ratsa M. F. pp.69-71 The Green's Function of the Basic Extremal Boundary Value Problems for the Operator's Disintegration Into the Helmholts Operators. (Russian) Suveyka I. V. pp.71-74 On the Hartman-Mycielsky Theorem. (Russian) Ursul M. I. pp.74-75