The mechanism proposed by Kormendy (1984) for the formation of counterrotating cores in elliptical galaxies is investigated using self-consistent numerical simulations of mergers between a high- and a low-luminosity elliptical galaxies. The conditions for a counterrotation to appear are determined, observational properties of the remnants are

IAUC 5129 available at Central Bureau for Astronomical Telegrams. IAUC 5129 available at Central Bureau for Astronomical Telegrams.

IAUC 5123 available at Central Bureau for Astronomical Telegrams.

IAUC 5115 available at Central Bureau for Astronomical Telegrams.

We develop a method for computing the probability densities of spherical voids in distribution of galaxies on a large scale. This method is applied to Poissonian cluster models. We consider CDM biased and non-biased models; the appropriate approximation has been used in each case. We find that, in the latter case, the probability finding a void

We have made a series of hydrodynamic calculations of core collapsing models to examine the effects of temperature dependence of nuclear compressibility. With this aim we have focused on the influence of the equation of state derived by Viñas et al. for two extreme types of nuclear interactions. A Multigroup Trapping Scheme for neutrino transport