Article citationsMore>>

A. E. El-Ahmady and A. Al-Rdade, “A Geometrical Characterizations of Reissner-Nordstrom Spacetime and Its Retractions,” International Journal of Applied Mathematics and Statistics, Vol. 33, No. 3, 2013, pp. 83-91.

has been cited by the following article:

• TITLE: On Retractions of Lobachevsky Space

  AUTHORS: A. E. El-Ahmady, K. Al-Onemi

  KEYWORDS: Lobachevsky Space; Lagrangian Equations; Retractions; Deformation Retractions; Foldings

  JOURNAL NAME: Applied Mathematics, Vol.4 No.3, March 21, 2013

  ABSTRACT: Our aim in the present article is to introduce and study new types of retractions of Lobachevsky space. Types of the deformation retracts of Lobachevsky space are presented. The relations between the folding and the deformation retract of Lobachevsky space are deduced. Types of minimal retractions of Lobachevsky space are also presented. Also, the isometric and topological folding in each case and the relation between the deformation retracts after and before folding have been obtained. New types of homotopy maps are deduced. Theorems governing this connection are achieved.