Serdica Bulgariacae mathematicae publicationes
Volume 15, 1989
Number 1

Fedeli, A.
Acompact spaces.
(pp. 311)

Konopka, C.
On extrinsic spheres in Sasakian manifolds.
(pp. 1215)

Kyurkchiev, Nikolaj V.
On a class of twosided iterative methods for
solving nonlinear equations. (in Russian)
(pp. 1618)

Wegner, B.
Über das kritische Verhalten zylindrischer
Abstandsfunktionen auf Untermannigfaltigkeiten euklidischer Räume.
(On the critical behavior of cylindrical distance functions on
submanifolds of euclidean spaces.) (in German)
(pp. 1927)

Rachev, S. T., A. Yu. Yakovlev, N. O. Kadyrova.
A concept of
Dstochastic ordering and its application to the competing
risks model.
(pp. 2831)

Todorinov, S.A., N. L. Petrova.
Directionally nonorderable groups.
(pp. 3233)

Lucchetti, R.
Stability in optimization.
(pp. 3448)

Stanilov, G.
Characteristic curvatures in the almost Hermitian
geometry.
(pp. 4952)

Popivanov, P. R., N. D. Kutev.
On the tangential oblique
derivative problem for a class of elliptic second order quasilinear
differential equations.
(pp. 5362)

Borubaev, A. A.
Completion of uniform spaces and extensions of
topological spaces. (in Russian)
(pp. 6373)

Kadomtsev, S. B.
On twodimensional surfaces with constant extrinsic
geometry. (in Russian)
(pp. 7477)

Kassabov, O. T.
Diffeomorphisms of pseudoRiemannian manifolds
and the values of the curvature tensor on degenerate planes.
(pp. 7886)
Number 2

Vandev, D., N. Trendafilov.
A type of stable stochastic processes
using LevyKhintchine formulae.
(pp. 8790)

Ignatov, Z. G., V. K. Kaishev.
A probabilistic interpretation of
multivariate Bsplines and some applications.
(pp. 9199)

Gajdov, S. D.
Objection and counterobjection equilibria in
manyplayer stochastic differential games.
(pp. 100107)

Drenska, Natalia T.
Numerical method for solving an elliptic
equation of fourth order.
(pp. 108113)

Dodunekova, R.
Detecting the signal appearing time.
(pp. 114118)

Sipacheva, O. V.
Zerodimensionality and completeness in free
topological groups. I. (in Russian)
(pp. 119140)

Sipacheva, O. V.
Zerodimensionality and completeness in free
topological groups. II. (in Russian)
(pp. 141154)

Stankov, D. K.
On an algebra of functions on the boundary of the
generalized unit sphere. (in Russian)
(pp. 155159)

Skordev, G. S.
The multiplicativity property of the fixed point index
for multivalued maps.
(pp. 160170)
Number 3

Tarkhanov, N. N., D. M. Shojkhet.
A remark on the probability of
degeneration of a multidimensional branching GaltonWatson process.
(pp. 171173)

Szász, F. A.
On Jacobson radical rings.
(pp. 174175)

Janous, W.
A minimum problem for a class of polynomials.
(pp. 176178)

Rodríguez, J.
Operational calculus for the generalized Bessel operator.
(pp. 179186)

Boju, V., L. Funar.
Courbure et changements conformes de
metrique. (Curvature and conformal change of the métric). (in French)
(pp. 187191)

Popov, V.
An easily computed upper bound for the condition
number of a matrix.
(pp. 192196)

Trencevski, K.
A formula for the kth covariant derivative.
(pp. 197202)

Dia, G.
Loi limite du regressogramme pour un processus ponctuel.
(Limit law of the regressogram for a point process). (in French)
(pp. 203209)

Koneva, N. P.
Congruences W in a biaxial space of hyperbolic type.
(in Russian)
(pp. 210216)

AlBassam, M.A., S. L. Kalla.
On orthogonal polynomials
associated with differential equations of Laguerre type.
(pp. 217222)

Satimov, N., A.Z. Fazylov.
Avoiding collisions in linear systems
with integral constraints. (in Russian)
(pp. 223231)

Owa, S., V. Micic, M. Obradovic.
Note on certain subclasses of univalent functions with quasiconformal extension.
(pp. 232238)

Chakalov, V. L.
On a generalization of the MarkovKrein
(f,y)problem. (in Russian)
(pp. 239251)

Cristev, D. I.
On some properties of solutions of semilinear
elliptic differential equations and inequalities. (in Russian)
(pp. 252258)

Pavlov, E.
Conformalholomorphic invariants.
(pp. 259265)

Aleksiev, V.
On a class of almost contact metric manifolds
conformally related to the Sasakian manifolds.
(pp. 266270)

Tabov, J. B.
On the local solvability of hyperbolic
overdetermined systems of partial differential equations.
(pp. 271274)
Number 4

Bovdi, A. A., K. Kh. Kolikov.
Lie nilpotency and ideals of crossed
products. (in Russian)
(pp. 275286)

Papageorgiou, N. S.
On the existence of fminimal viable
solutions for a class of differential inclusions.
(pp. 287292)

Drensky, V. S., T. G. Rashkova.
Varieties of metabelian Jordan algebras.
(pp. 293301)

Kyurkchiev, N. V., A. S. Andreev.
A twosided method for simultaneous computation of multiple zeros of a polynomial equation. (in Russian)
(pp. 302304)

Cristev, D. I.
A theorem of PhragmenLindelof type for parabolic
equation of second order.
(pp. 305308)

Genov, G. K., P. N. Siderov.
On some properties of the Grigorchuk group and its group algebra over a field of characteristic two. (in Russian)
(pp. 309326)

Goel, R. M., B. S. Mehrok
A coefficient inequality for a subclass of closetoconvex functions.
(pp. 327335)

Kryszewski, W., D. Miklaszewski
The Nielsen number of setvalued maps. An approximation approach.
(pp. 336344)

Petkova, S. V.
Spaces with SteenrodSitnikov torsion homologies. (in Russian)
(pp. 345350)

Mikhova, V.
Canonical connection and the canonical conformal
group on a Riemannian almostproduct manifold.
(pp. 351358)
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