M. P. Ryan

activity

19932017

most citedQuantum bounds for gravitational de Sitter entropy and the Cardy-Verlinde formula

29 citations · 158 across the 18 of their papers we have counts for

collaborators

Showing 2004 · hep-thShow all

2 papers · 2 filters

hep-th2004★ 5 cited

Regular non-twisting S-branes

Octavio Obregon, Hernando Quevedo, Michael P. Ryan

We construct a family of time and angular dependent, regular S-brane solutions which corresponds to a simple analytical continuation of the Zipoy-Voorhees 4-dimensional vacuum spac…

hep-th2004★ 5 cited

Duality Symmetry in Kaluza-Klein $n + D + d$ Dimensional Cosmological Model

J. A. Nieto, M. P. Ryan, O. Velarde +1

It is shown that, with the only exception of $n = 2$ , the Einstein-Hilbert action in $n + D + d$ dimensions, with $n$ times, is invariant under the duality transformation $a\to \frac{1}{…

Regular non-twisting S-branes

Duality Symmetry in Kaluza-Klein n+D+d Dimensional Cosmological Model

Duality Symmetry in Kaluza-Klein $n + D + d$ Dimensional Cosmological Model