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Black holes and quasiblack holes: Some history and remarks
José P. S. Lemos
A brief reference to the two Schwarzschild solutions and what Petrov had to say about them is given. Comments on how the Schwarzschild vacuum solution describes a black hole are al…
Membrane paradigm and entropy of black holes in the Euclidean action approach
José P. S. Lemos, Oleg B. Zaslavskii
The membrane paradigm approach to black holes fixes in the vicinity of the event horizon a fictitious surface, the stretched horizon, so that the spacetime outside remains unchange…
Holographic charge transport in Lifshitz black hole backgrounds
José P. S. Lemos, Da-Wei Pang
We study charge transport properties in a domain-wall geometry, whose near horizon IR geometry is a Lifshitz black hole and whose UV geometry is AdS. The action for the gauge field…
Regular black holes: Electrically charged solutions, Reissner-Nordström outside a de Sitter core
José P. S. Lemos, Vilson T. Zanchin
To have the correct picture of a black hole as a whole it is of crucial importance to understand its interior. The singularities that lurk inside the horizon of the usual Kerr-Newm…
Unitary theories in the work of Mira Fernandes (beyond general relativity and differential geometry)
José P. S. Lemos
An analysis of the work of Mira Fernandes on unitary theories is presented. First it is briefly mentioned the Portuguese scientific context of the 1920s. A short analysis of the ex…