Singularities in geodesic surface congruence
| dc.creator | Cho, Yong Seung | |
| dc.creator | Hong, Soon-Tae | |
| dc.date | 2008-06-12 | |
| dc.date.accessioned | 2026-07-07T12:44:38Z | |
| dc.date.available | 2026-07-07T12:44:38Z | |
| dc.description | In the stringy cosmology, we investigate singularities in geodesic surface congruences for the time-like and null strings to yield the Raychaudhuri type equations possessing correction terms associated with the novel features owing to the strings. Assuming the stringy strong energy condition, we have a Hawking-Penrose type inequality equation. If the initial expansion is negative so that the congruence is converging, we show that the expansion must pass through the singularity within a proper time. We observe that the stringy strong energy conditions of both the time-like and null string congruences produce the same inequality equation. | |
| dc.description | 4 pages | |
| dc.identifier | https://arxiv.org/abs/0806.2061 | |
| dc.identifier | http://arxiv.org/abs/0806.2061 | |
| dc.identifier | Phys.Rev.D78:067301,2008 | |
| dc.identifier | doi:10.1103/PhysRevD.78.067301 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/220834 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.title | Singularities in geodesic surface congruence | |
| dc.type | text |