  Geometrical model of structure of the universe is examined to obtain
analytical expression for the two points nonlinear correlation function.
According to the model the objects (galaxies) are concentrated into two types
of structure elements - filaments and sheets. We considered the filaments (
similar to galaxy filaments ) simply as straight lines and the sheets ( similar
to superclusters of galaxies ) simply as planes. The homogeneously distributed
objects are also taken into consideration. The spatial distribution of lines,
planes and points is uncorrelated. The nonlinear correlation function depends
on four parameters and is similar to the observed and simulated ones for
different samples. It describes quite well the correlation of galaxies,
clusters of galaxies and dark matter distribution. Possible interpretation of
the parameters of nonlinear correlation function is discussed.
