New Developments in Differential Geometry: Proceedings of the Colloquium on Differential Geometry, Debrecen, Hungary,July 26-30, 1994

Preface. List of participants. Hypercomplex structures on quaternionic manifolds; D.V. Alekseevsky, S. Marchiafava. Time inversion in physics; T. Antal. Non commutative geometry of GLp-Bundles; A. Asada. Totally umbilical degenerate Monge hypersurfaces of R42; A. Bejancu. The left exactness of the smooth left Puppe sequence; P. Cherenack. A linear connection associated with any second order differential equation field; M. Crampin. Geometry of geodesic tubes on Sasakian manifolds; M. Djoric. Classification of differential (n-1)-forms on an n-dimensional manifold with boundary; W. Domitrz. Natural relations between connections in 2-fibred manifolds; M. Doupovec, A. Vondra. Connections on higher order frame bundles; M. Elzanowski, S. Prishepionok. The differential geometry of Cosserat media; M. Epstein, M. de León. The parametric-manifold approach to canonical gravity; G. Fodor, Z. Perjés. Admissible operations and product preserving functors; J. Gancarzewicz, et al. Curvature properties of para Kähler manifolds; E. García-Río, et al. Four dimensional Osserman Lorentzian manifolds; E. García-Río, D.N. Kupeli. The eta invariant and the equivariant spin bordism of spherical space form 2 groups; P.B. Gilkey, B. Botvinnik. On locally conformal Kähler structures; T. Kashiwada. Torsion-free connections on higher order frame bundles; I. Kolár. The trace decomposition of tensors of type (1,2) and (1,3); D. Krupka. Higher-order constrained systems on fibred manifolds: An exterior differential systems approach; O. Krupková. The method of separation of variables for Laplace-Beltrami equation in semi-Riemannian geometry; D.N.Kupeli. A geometrical approach to classical field theories: a constraint algorithm for singular theories; M. de León, et al. Noether type theorems in higher order analytical mechanics; R. Miron. The electromagnetic field in the higher order relativistic geometrical optics; R. Miron, T. Kawaguchi. On a Riemannian approach to the order &agr; relative entropy; M. Miyata, et al. A differential equation related with some general connections; T. Otsuki. On quasi connections on fibred manifolds; P. Popescu. Diffeomorphism groups of a manifold with boundary; T. Rybicki. Separability of time-dependent second-order equations; W. Sarlet. The field equations of generalized conformally flat spaces of metric g&mgr;&ngr; (x, &xgr; &xgr;¯ = e2&sgr;(x,&xgr;,&xgr;¯) &eegr;&mgr;&ngr;; P.C. Stavrinos, et al. Symmetries of sprays and admissible Lagrangians; J. Szenthe. Curvature of submanifolds in points Finsler spaces; L. Tamássy. Special vector fields on a compact Riemannian manifold; G. Tsagas. Magnetic dynamical systems; C. Udrişte, et al. Totally geodesic orbits in homogeneous spaces; Y. Villarroel. Parallel and transnormal curves on surfaces; B. Wegner.