| Título: | Folding and Fundamental Groups of Flat Robertson-walker Space |
| Autores: | El-Ahmady, A. E.; Mathematics Department, Faculty of Science, Taibah University, Madinah |
| Fecha: | 2013-04-01 |
| Publicador: | Indian Society for Education and Environment (ISEE) |
| Fuente: |
Ver documento |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
| Tema: |
Science; Technology Flat Robertson-Walker Space W4, Homotopy Groups, Foldings, Retractions, Deformation Retracts |
| Descripción: | This paper aims to give a combinatorial characterization and also construct representations of the fundamental groups of the submanifolds on flat Robertson-Walker space by using some geometrical transformations. The homotopy groups of the limit folding on flat Robertson-Walker space are presented. The homotopy groups of the retractions and deformation retract on flat Robertson-Walker space are obtained. The fundamental groups of some types of geodesics in the flat Robertson-Walker space are discussed. New types of homotopy maps are deduced. Theorems governing this connection are achieved. |
| Idioma: | Inglés |
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