| NGeneralize of loc * npattern
| NId of loc
| NIntro of loc * string
+ | NInversion of loc * CicNotationPt.term * npattern
| NLApply of loc * CicNotationPt.term
| NLetIn of loc * npattern * CicNotationPt.term * string
| NReduce of loc * [ `Normalize of bool | `Whd of bool ] * npattern