Classification of null relations

Universal relations include the jet analogue of the inherited null identity $\mathsf{Rec}((qi\theta +1)M_{\mathrm{R}})=0$ Jnull,XVD. XV-D proved that universal relations carry no defect for any $T$. The next results show that flat-annihilator relations also carry no defect, and that jet-detected relations produce a defect that is locally a functional of a finite jet.