Obverse/inverse applies to the monadic use of a verb. So, + b._1 NB. Conjugate + - b._1 NB. Negation - * b._1 NB. Signum. Cannot undo this. |domain error | *b._1 % b._1 NB. Inverse %
When applied to a dyadic use it is interpreted as the left argument bound to the verb making a monadic verb. 3+inv 4 1 (3&+)b._1 _3&+ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
