The existence of black holes is a central prediction general relativity and thus serves as basic consistency test for modified theories gravity. In spherical symmetry, only two classes dynamic solutions are compatible with the formation an apparent horizon in finite time distant observer. Moreover, follows unique scenario involving both types solutions. To be their existence, any self-consisten...

The fivebrane in M-theory comes equipped with a higher order gauge field which should have a formulation in terms of a 2-gerbe on the fivebrane. One can pose the question if the BV-quantization scheme for such a higher order gauge theory should differ from the usual BV-algebra structure. We give an algebraic argument that this should, indeed, be the case and a fourth order equation should appea...