The geometry of degenerate submanifolds of semi-Riemannian manifolds is discussed in detail in the books by Kupeli and by Duggal and Bejancu. In this article, I use the generalized definition of the second fundamental form, as suggested in the above-mentioned exercise of O’Neill's book, and discuss, thereupon, some general properties of Cited by: Entdecken Sie "Foundations of Photonic Crystal Fibres ()" von Didier Felbacq und finden Sie Ihren Buchhändler. The focus of this book lies at the meeting point of electromagnetic waveguides and photonic crystals. Although these are both widely studied topics, they have been kept apart until recently. The purpose of the first edition of this book was to give state-of-the-art theoretical and. On Clairaut Anti-invariant Semi-Riemannian Submersions: Y. Gündüzalp: On the geometry of conformal slant submersions: Y. Gündüzalp, M.A. Akyol: Some Results for Generalized Null Mannheim curves in 4-dimensional Semi-Euclidean: N. Kılıç Aslan, K. İlarslan Space with Index 2: Smarandache Curves According to q-Frame in. In this talk we will present Singuler Semi-Riemannian manifolds (introduced by Demir Küpeli in [1]) with an adapted almost contact structure. We will study the main facts about such a structure, with some examples. Key Words: Contact Manifolds, Almost Semi Riemannian Manifolds, Singular Manifolds, Singular Semi Riemannian Almost Contact.

The classi cation of conformally Einstein manifolds is still an intriguing open problem nowadays. Despite recent progress on product manifolds and Kahler manifolds, the general situation needs to be elucidated. Our purpose on this lecture is to determine all four-dimensional conformally Einstein . A null chain is the projection on M of a nonvertical null geodesic which is orthogonal to S. By a result of Koch every null geodesic projects either to a point, or to a null chain, or to a chain of M (cf proposition in, p ). If M is strictly pseudoconvex, then all Cited by: 2. Add book; Categories; Most Popular; Recently Added; Z-Library Project; Top Z-Librarians; Blog; Main TermsVector search result for "null" 1. Алгоритмы. Справочник с примерами на C, C++, Java и Python (CD) Null curves and hypersurfaces of semi-Riemannian manifolds. World . Buy Geometry ebooks from We have a wide range of authors and publishers in our portfolio. Take a look and find what you need for your studies! Use .

17th International Geometry Symposium June , Erzincan Binali Yildirim University, Erzincan-TURKEY 4 FOREWORD Hosted by Erzincan Binali Yıldırım University between June , , the 17th International Geometry Symposium was held in Erzincan which is a beautiful and has historical background in the east of Size: KB. Rectifying Salkowski Curves with Serial Approach in Minkowski 3-Space Beyhan YILMAZ, İsmail GÖK Yusuf YAYLI Normal Section Curves on Semi-Riemannian Manifolds Feyza Esra ERDOĞAN Selcen YÜKSEL PERKTAù On Generalized D-Conformal Deformations of Some Classes of Almost Contact Metric Manifolds Nülifer ÖZDEMİR of the geometry to null curves in Lorentz manifolds and, more generally, in semi-Riemannian manifolds. Some notations, deﬁnitions and reviews of some aspects of the differential geometry in R3 1, can be found in [19,17,18,20,21,25,12,24]. This paper presents algorithms for computing the null frame of a given null or pseudo null curve inAuthor: Osmar Alêssio, Sayed A.-N. Badr, Soad A. Hassan, Luciana A. Rodrigues, Fábio N. Silva, M. A. Soliman. Fortuné Massamba and S. Ssekajja, On total mean curvatures of foliated half-lightlike submanifolds in semi-Riemannian manifolds, Hacettepe Journal of Mathematics and Statistics, accepted Fortuné Massamba and S. Ssekajja, Null hypersurfaces evolved by their mean Curvature in a Lorentzian manifold, Colloquium Mathematicum, (),