Neutrino-gaseous ''pancakes'' and the problem of hidden mass

Taking into account peculiar velocities of neutrinos the gaseous component is shown to dominate in the central part of a cosmological ''pancake'' (rhosub(p) > rhosub(ν)), while on the average anti rhosub(b) << anti rhosub(ν). Therefore fragmentation of a gaseous ''pancake'' and later clustering of the fragments into galaxies and groups of galaxies are determined by velocity distribution and gravity of the gaseous component. The hidden mass is formed by capture of neutrinos by clustering clouds. Formation of the cluster of galaxies is connected with perturbations embracing all the neutrino-gaseous ''pancake'', initial ratio of neutrino-to-gaseous densities being reestablished. It is shown that the first ''pancakes'' were formed at the red shifts z=5-8