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## BASM n.3 (13), 1993

 Research Paper The problem of determination of multiregular tilings of space. (Russian) Zamorzaeva Elizaveta pp.3-10 Isogonal strata tessellations of the Lobachevsky space. (Russian) Makarov P. V. pp.11-14 Totally symmetric $n$-ary loops. (Russian) Ursu L. A. pp.15-25 Conditions of completeness in a family of extensions of a duality-intuitionistic logic. (Russian) Gkhaliekh Ya. N. pp.26-34 Analysis of the condition ${\germ A}(k)$ for four-dimensional systems of differential equations. II. (Russian) Bronshtejn I. U., Kopanskij A. Ya. pp.35-40 Solvability of linear parabolic boundary value problems in anisotropic spaces ${\cal H}\sb p\sp s, (s\in R)$ of Bessel potentials. (Russian) Zhitarashu N. V., Rudi I. I. pp.41-48 The uniform estimates for solutions of nonstrictly hyperbolic equation of second order with large parameter. (English)Perjan A. V. pp.49-53 Conditions of presence of four integral straight lines for a cubic differential system in the case of a center or focus. (Russian)Kozima D. V., Shubeh A. S. pp.54-62 Numerical investigation of the process of dynamic action on a layered obstacle. (Russian) Rîbachin Boris, Secrieru Grigore pp.63-70 Impact of a viscoelastic rod upon a heated obstacle. (Russian) Naval I. K. pp.71-75 Exact shifts of the constraints in methods of centres. (English) Zaporojan D. pp.76-82 Impact of an elastic rod of a finite length upon a compliant obstacle. I. (Russian) Cheban V. G. pp.83-90 Some results for a priority discipline DD with non-zero switching. (English) Mişcoi Gheorghe pp.91-94 Multiplicative system of functions corresponding to the group $C\sb 2 \times \Gamma$. (English) Kolesnik Alexander pp.95-98