Inequalities for characteristic numbers of flags of distributions and   foliations
  We prove inequalities relating the degrees of holomorphic distributions and of holomorphic foliations forming a flag on $\mathbb{P}^n$. Such inequalities are inspired by the so called Poincar\'e problem for foliations. 
Maur\'icio Corr\^ea JR and Marcio G. Soares
math.AG math.CV math.DS