We present the class of regular homogeneous T-models with vacuum dark fluid, associated with a variable cosmological term. The vacuum fluid is defined by the symmetry of its stressenergy tensor, i.e., its invariance under Lorentz boosts in a distinguished spatial direction (pj = −ρ), which makes this fluid essentially anisotropic and allows its density to evolve. Typical features of homogeneous...

We study quasi-spherical Szekeres space-time (which possess no killing vectors) for perfect fluid, matter with tangential stress only and matter with anisotropic pressure respectively. In the first two cases cosmological solutions have been obtained and their asymptotic behaviour have been examined while for anisotropic pressure, gravitational collapse has been studied and the role of the press...