Serdica Bulgariacae mathematicae publicationes
Volume 6, 1980
Number 1
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Imanaliev, M., K. Alymkulov.
Determination of periodic solutions of nonlinear wave equations.
(in Russian)
(pp. 3-8)
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Dimitrov, D. G., V. A. Popov.
A generalization of Timan's theorem for approximation of functions by algebraic polynomials.
(pp. 9-15)
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Kirov, G. Kh.
Some extremal problems for k-splines. (in Russian)
(pp. 16-20)
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Chakalov, V. L., E. M. Dimitrov.
Interpolation and uniform approximation of conjugate functions.
(in Russian)
(pp. 21-28)
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Petrushev, P. P.
Best rational approximations in the Hausdorff metric. (in Russian)
(pp. 29-41)
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Tkachenko, M. G.
The behaviour of cardinal functions
on inverse spectra consisting of topological spaces.
(pp. 42-55)
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Buda, Anatolij O.
Program machines and transducers of trees. (in Russian)
(pp. 56-62)
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Stoyanova-Venkova, A. N.
On bases of identities of Grassmann algebras. (in Russian)
(pp. 63-72)
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Khadzhiivanov, N. G.
On absolutely non-zero solutions of some algebraic congruences. (in Russian)
(pp. 73-75)
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Andreev, A. S.
Stability of best approximations in relation to Hausdorff distance. (in Russian)
(pp. 76-83)
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Boyanov, T. P.
Exact asymptotic behavior of the best Hausdorff approximation of classes of functions with a given modulus of continuity. (in Russian)
(pp. 84-97)
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Tashev, S. P.
Existence of the solution of a differential equation with a many-valued right-hand side. (in Russian)
(pp. 98-104)
Number 2
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Gol'dberg, V. V.
On the theory of 4-webs of
many-dimensional surfaces on differentiable manifold X2r. (in Russian)
(pp. 105-119)
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Petrushev, P. P.
Lower bounds for best rational approximations in the Hausdorff metric. (in Russian)
(pp. 120-127)
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Nenov, N. D., N. G. Khadzhiivanov.
On minimal t-graphs. (in Russian)
(pp. 128-142)
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Dimitrov, M. Ts.
A single-server M/M/1 system with a generalized dynamic priority. (in Russian)
(pp. 143-152)
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Bozinov, N. S., I. H. Dimovski.
A representation of the commutant of the initial value Sturm-Liouville operator.
(pp. 153-166)
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Popivanov, P. R., G. S. Popov.
Micro-local properties of a certain class of pseudo-differential operators with multiple characteristics. (in Russian)
(pp. 167-181)
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Radnev, P.
Projective objects in the category of p-rings. (in Russian)
(pp. 182-184)
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Totkov, G. A.
Inverse theorems for approximations by splines in Orlicz spaces. (in Russian)
(pp. 185-197)
Number 3
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Stratigos, P. D.
Extensions of additive set-functions.
(pp. 197-201)
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Petrushev, P. P.
Rational approximations of functions with bounded variation in the Hausdorff and integral metric. (in Russian)
(pp. 202-210)
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Petrov, K. P.
Bornology of polynormed algebras. (in Russian)
(pp. 211-218)
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Bozinov, N. S.
Differentiation properties and multipliers of Berg-Dimovski convolution for the differentiation operator.
(pp. 219-239)
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Todorov, V. T.
On a Mazurkiewicz theorem.
(pp. 240-244)
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Iliev, I. D.
On the boundary problems in a half-space for a class of nonhypoelliptic equations with constant strength.
(pp. 245-257)
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Nachev, N. A., T. Zh. Mollov.
Ulm-Kaplansky invariants of the group of normed units of a modular group ring of a primary Abelian group. (in Russian)
(pp. 258-263)
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Cobanow, G. S.
Räumlich homogene kritische
Verzweigungsprozesse mit kontinuierlicher Zeit. I. (in German)
(pp. 264-269)
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Nenov, N. D.
On the existence of a minimal t-graph with a given number of vertices. (in Russian)
(pp. 270-274)
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Veselinov, V. M., I. Kirkorov.
A general estimation for a certain class of linear operators. (in Russian)
(pp. 275-277)
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Andreev, A. S., R. P. Maleev.
Estimate of the error of the finite element method for one-dimensional boundary value problems. (in Russian)
(pp. 278-283)
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Debes, H.
Random motions of infinite particle
systems on R1 without overtaking.
(pp. 284-290)
Number 4
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Nedev, S. I.
Selection and factorization theorems for set-valued mappings.
(pp. 291-317)
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Martinov, N. J.
On the number of triangles of a graph. (in Russian)
(pp. 318-323)
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Fichter, K.-H., J. Kerstan.
Invarianz von Punktprozessen bei zufälligen Bewegungen. I. (in German)
(pp. 324-340)
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Saxena, R. B., T. C. Joshi.
Inhomogeneous lacunary
interpolation by splines. I: (0.2:0.3) case.
(pp. 341-351)
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Iliev, V. V.
Surfaces with pg=3, K2=3. I.
(in Russian)
(pp. 352-362)
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Shopov, P. P.
On a classification of irrational numbers with respect to approximation and its application to the metric theory of continued fractions. (in Russian)
(pp. 363-372)
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Nenov, N. D.
A new estimation from below for the Graham-Spencer number N(3,5). (in Russian) (pp. 373-383)
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Ioakimidis, N. I., P. S. Theocaris.
A remark on the Lobatto-Chebyshev method for the solution of singular integral equations and the evaluation of stress intensity factors.
(pp. 384-390)
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Meshalkin, L. D.
New results in the mathematical techniques for the investigation of chronic diseases. (in Russian)
(pp. 391-396)
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