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gr-qc2005
"Swimming" versus "swinging" in spacetime
Eduardo Gueron, Clovis A. S. Maia, George E. A. Matsas
Wisdom has recently unveiled a new relativistic effect, called ``spacetime swimming'', where quasi-rigid free bodies in curved spacetimes can "speed up", "slow down" or "deviate" t…
gr-qc2005
New thought experiment to test the generalized second law of thermodynamics
George E. A. Matsas, Andre R. Rocha da Silva
We propose an extension of the original thought experiment proposed by Geroch, which sparked much of the actual debate and interest on black hole thermodynamics, and show that the…