Positivity bounds for twist-two parton distributions in multicolored QCD are
stronger than their analogs at finite $N_c$. They include the enhanced large
$N_{c}$ version of Soffer inequality. These bounds are compatible with the
DGLAP evolution to higher normalization points.Comment: 7 pages, to be published in the proceedings of "The Phenomenology of
  Large Nc QCD" workshop, 9-11 January 2002, Arizona State University, Temp

Pobylitsa, P. V.