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gr-qc2004
Time and "angular" dependent backgrounds from stationary axisymmetric solutions
Octavio Obregon, Hernando Quevedo, Michael P. Ryan
Backgrounds depending on time and on "angular" variable, namely polarized and unpolarized Gowdy models, are generated as the sector inside the horizons of the mani…
hep-th2004
Noncommutative Topological Half-flat Gravity
H. Garcia-Compean, O. Obregon, C. Ramirez
We formulate a noncommutative description of topological half-flat gravity in four dimensions. BRST symmetry of this topological gravity is deformed through a twisting of the usual…