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Preface...............................................................vii Kdihler magnetic fields on a product of complex hyperbolic spaces ......1 T' Adachi Real analytic almost complex manifolds................. 12 L N. Apostolova Fuchs-like relation for regular connections on a compact Riemann surface ... 17 E. Corel Oka's theorem for superholomorphic functions and superforms........24 VG. Cristea Involutive distributions of codimension one in Kaehler manifolds.......30 G. Ganchev On the theory of two-dimensional surfaces in Euclidean space ........41 G. Ganchev and V Milousheva On hypercomplex pseudo-hermitian manifolds...............51 K. Gribachev, M. Manev and S. Dimiev Hermitian-like curvatures of the four basic classes of real hypersurfaces of a complex space form .........................63 M. Hristov On operator differentiation in the action principle in quantum field theory ... 76 B. Z Iliev Time-like killing vector fields on compact indefinite Kahler surfaces.....108 H. Kamada Three theorems on isotropic immersions .................116 S. Maeda Circles and Kaihler immersions......................123 S. Maeda and T' Adachi On the Meilikhson theorem .......................135 M.S. Marinov Diffeomorphisms preserving a skew-symmetric curvature operator in Riemannian geometry.........................141 S.M. Marinov Curvature tensors on almost contact manifolds with B-metric........145 G. Ndkova Curvature tensors in the basic classes of real isotropic hypersurfaces of a Kaehler manifold with B-metric ...................159 G. Nakova A function of direction in a Weyl subspace associated with a set of orthogonal vector fields........................168 A. Ozdeger Complex structures and the quark confinement ..............179 L.B. Pestov Characterizations of parallel isometric immersions of compact rank one symmetric spaces into space forms by circles ...............191 K. Suizu Poincar6 formulae of submanifolds in complex space forms.........205 H. Tasaki Curvature operators in the relativity ...................219 V Videv and Y Tsankov On integrability of almost quaternionic manifolds .............229 A. YamadaLibrary of Congress Subject Headings for this publication: Functional analysis Congresses, Geometry, Differential Congresses, Mathematical physics Congresses