TY  - JOUR
AU  - El-Ahmady, A. E. 
AU  - Al-Rdade, A. 
PY  - 2013
TI  - Deformation Retracts of the Reissner-Nordstrom Spacetime and its Foldings
JF  - American Journal of Applied Sciences
VL  - 10
IS  - 7
DO  - 10.3844/ajassp.2013.740.745
UR  - https://thescipub.com/abstract/ajassp.2013.740.745
AB  - Our aim in the present article is to introduce and study the relation between the deformation retract of the Reissner-Nordstrom spacetime N4 and the deformation retract of the tangent space Tp (N4). Also, this relation discussed after and before the isometric and topological folding of N4 into itself. New types of conditional folding are presented. Some commutative diagrams are obtained.