2 papers
gr-qc2003
Remarks on the Entropy of Non-Stationary Black Holes
G. Allemandi, L. Fatibene, M. Francaviglia
The definition of entropy obtained for stationary black holes is extended in this paper to the case of non-stationary black holes. Entropy is defined as a macroscopical thermodynam…
gr-qc1996
A geometric definition of Lie derivative for Spinor Fields
Lorenzo Fatibene, Marco Ferraris, Mauro Francaviglia +1
Relying on the general theory of Lie derivatives a new geometric definition of Lie derivative for general spinor fields is given, more general than Kosmann's one. It is shown that…