title: Connectedness theorem
text: # Connectedness theorem
  
  In mathematics, the connectedness theorem may be one of
  
  * Deligne's connectedness theorem
  * Fulton–Hansen connectedness theorem
  * Grothendieck's connectedness theorem
  * Hartshorne's connectedness theorem
  * Zariski's connectedness theorem, a generalization of Zariski's main theorem
  