Index - N
| N | Zsyntax.Labelled.Rule.Interface, Zsyntax.Labelled.Rule | 
| Neutral | Zsyntax.Labelled.Rule.Interface, Zsyntax.Labelled.Rule | 
| neutralize | Zsyntax.Formula, Zsyntax | 
| neutralizeFormula | Zsyntax.Formula, Zsyntax | 
| neutralizeOs | Zsyntax.Formula, Zsyntax | 
| NeutralKind | Zsyntax.Labelled.Rule.Interface, Zsyntax.Labelled.Rule | 
| NoResults | Otter.SearchRes, Otter, Zsyntax | 
| normalize | Zsyntax.Formula, Zsyntax | 
| NotATheorem | Otter.SearchRes, Otter, Zsyntax | 
| nuLabel | Zsyntax.Formula, Zsyntax |