Characteristic Numbers and invariant subvarieties for Projective Webs
  We define the characteristic numbers of a holomorphic k-distribution of any dimension on $mathbb P^n$ and obtain relations between these numbers and the characteristic numbers of an invariant subvariety. As an application we bound the degree of a smooth invariant hypersurface. 
Maycol Falla Luza, Thiago Fassarella
math.AG math.CV