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gr-qc2007★ 4 cited
Rigidly rotating dust solutions depending upon harmonic functions
Stefano Viaggiu
We write down the relevant field equations for a stationary axially symmetric rigidly rotating dust source in such a way that the general solution depends upon the solution of an e…
gr-qc2004
Black Hole Entropy and Dilatations
Stefano Viaggiu
Dilatations by means of a constant factor can be seen in a double way: as a simple change of units length or as a conformal mapping of the starting spacetime into a ``stretched'' o…