A DOUBLY-CONNECTED COSMOLOGICAL MODEL

A uniform, isotropic cosmological model filled by scalar and pseudosca lar fields subject to chiral symmetry is described. The model is nonsi ngular, topologically compact, and possesses particlelike properties. Space-time is two-sheeted. The model is doubly-connected and CPT invar iant. it consists of two pulsating universes (world and antiworld). Th e dynamical K entropy resulting from the instability of the initial st ate of the fields and the double-connectedness of the model is calcula ted. Scalar gravitational perturbations can form periodic structures i n the spatial distribution of the effective energy density of the fiel ds, since the spatial scales of the perturbations are commensurate. St ructures of this kind may be responsible for the periodic distribution of distant astronomical objects.