Corollary: Replacement text for XV-D, Prop.\ prop:reduction (iii)

Under (H1)–(H2) of XVD: if (eq:jetboundE) below fails for ${b^{\circ }}_{D,\gamma }=v_{\gamma }{c}_{D,0}$ with $|\gamma |=3$, then $c_{D,0}$ has no extension to ${\mathcal{D}}^{\prime }(S_0)$, and the sequence $v_{\gamma }{\varphi }_n$ built from XV-C's failure sequence for ${b^{\circ }}_{D,\gamma }$ excludes an extension of $c_{D,0}$ in the sense of Proposition prop:erratum(d). Conversely, extendability of ${b^{\circ }}_{D,\gamma }$ does not imply extendability of $c_{D,0}$ without a further hypothesis on $v_{\gamma }$ near $Z$.