is the logical NOR function. It evaluates its arguments in order, giving False immediately if any of them are True, and True if they are all False.


  • Nor[e1,e2,] can be input in StandardForm and InputForm as e_(1) nor e_(2) nor .... The character can be entered as EscnorEsc or \[Nor]. »
  • Nor[e1,e2,] is equivalent to Not[Or[e1,e2,]]. »
  • Nor has attribute HoldAll, and explicitly controls the evaluation of its arguments. In Nor[e1,e2,] the e_(i) are evaluated in order, stopping if any one of them is found to be True. »
  • Nor gives symbolic results when necessary, removing initial arguments that are False.
  • Nor is not Flat.
Introduced in 2000