Serdica Bulgariacae mathematicae publicationes

Volume 1, 1975

Number 1

• Bojadziev, P. G. Approximation analytischer Funktionen durch rationale. (in Russian) (pp. 5-11).
• Nedev, S. I., M. M. Coban. o-metrics and proximity spaces. Metrization of proximity spaces. (in Russian) (pp. 12-28)
• Skordev, G. S. Coincidence and co-coincidence of acyclic mappings. (in Russian) (pp. 29-41)
• Iliev, L. G. Riemann'sche ganze Funktionen. (in German) (pp. 42-50)
• Dimovski, I. H. Foundations of operational calculi for the Bessel-type differential operators. (pp. 51-63)
• Rusev, P. K. Some boundary properties of a series in Laguerre's polynomials. (pp. 64-76)
• Sendov, Bl. H. Order of best Hausdorff polynomial approximation of certain functions. (pp. 77-87)
• Kirchev, K. P., Trojanski, S. L. The Orlicz spaces associated with Orlicz functions that do not satisfy the D₂-condition. (in Russian) (pp. 88-95)
• Popov, V. A. The approximation of functions of bounded variation by rational functions. (in Russian) (pp. 96-103)
• Bol'shev, L. N., M. S. Nikulin. A certain solution of the homogeneity problem. (in Russian) (pp. 104-109)
• Bojanov, B. D. New best quadrature formulae. (pp. 110-120)

Number 2

• Popivanov, N. I. Coincidence of the weak and the strong solution of boundary value problems for first order linear systems. (in Russian) (pp. 121-132)
• Choban, M. M. Modifications of topologies, and nonemptiness of classes. (in Russian) (pp. 133-143)
• Kunze, J., A. K. Ljudskanov. Die Anwendung von Unterordnungskriterrien in Bulgarischen. (in German) (pp. 144-157)
• Dimitrov, B. N., Hr. K. Karapenev. Certain characteristics of queueing systems with finite sources, an unreliable server and absolute priority. (in Russian) (pp. 158-166)
• Radenski, A. A. An algorithm for finding all isomorphisms of two graphs. (in Russian) (pp. 167-177)
• Maleev, R. P. On conditionally convergent series in Orlicz spaces L_M. (in Russian) (pp. 178-182)
• Skordev, G. S. On a theorem of Bourgin-Yang. (pp. 183-198)
• Kirchev, K. P. Dissipative random processes. (in Russian) (pp. 199-217)
• Popov, V. A. Direct and converse theorems for spline approximation with free knots. (pp. 218-224)

Number 3-4

• Topencarov, V. V. Éléments de la théorie des n-categories. (in French) (pp. 225-248)
• Mollov, T. Zh. Sylow p-subgroups of the unit groups of modular group algebras of abelian p-groups. (in Russian) (pp. 249-260)
• Iordanov, I. V. Problème non-coercif pour une inéquation variationnelle elliptique à deux contraintes. (in French) (pp. 261-268)
• Popova, A, A., M. M. Cvetanov. Duality in problems of the calculus of variations of arbitrary order higher than one. (in Russian) (pp. 269-284)
• Nedev, S. I. Selected theorems on multivalued sections and extensions. (in Russian) (pp. 285-294)
• Popivanov, N. I. Boundary value problems for equations of mixed type with two lines of parabolic degeneracy. (in Russian) (pp. 295-310)
• Pavlov, H. V. Necessary and sufficient conditions for the input flow to be Poisson in the case of an Erlang queueing system with losses. (in Russian) (pp. 311-316)
• Skordev, G. S. On a theorem of H. Hopf. (pp. 317-325)
• Konstantinov, M. M., D. D. Bainov. A boundary value problem for a differential equation with a retarded argument and a parameter. (in Russian) (pp. 326-330)
• Bojadzhiev, P. G. The dependence of the best rational approximation of analytic functions on the distribution of the poles of the approximating functions. (pp. 331-336)
• Sysoeva, T. Ju. Reductive linear algebraic groups generated by quasi-reflections. (pp. 337-345)
• Ivanova-Karatopraklieva, I. Infinitesimal bendings of surfaces of revolution with mixed curvature. (in Russian) (pp. 346-355)
• Popivanov, P. R. Subelliptic estimates for pseudodifferential operators with double characteristics. (in Russian) (pp. 356-371)
• Petkov, V. M. The Cauchy problem for a certain class of non-strictly hyperbolic equations with double characteristics. (in Russian) (pp. 372-380)
• Martinov, N. I. Distance-transitive graphs. (in Russian) (pp. 381-385)
• Popov, V. A. Approximation of convex functions by algebraic polynomials in Hausdorff metric. (pp. 386-398)
• Panov, A. A. Enumeration of the number of (p,q)-labyrinths. (in Russian) (pp. 399-408)
• Trautner, R. Eine Vermutung von Ilieff über Nichtfortsetzbarkeit von Potenzreihen. (in German) (pp. 409-410)