 the Delaunay immersion given by Theorem \[theoremPerturbedDelaunay\].  #### Limit axis.  In order to compute the limit axis of $f_t$ at the end around $p_{i,t}$, let $\widehat{\Delta}_{i,t}$ be the oriented axis of $\widehat{f}_{i,t}^{\mathcal{D}}$ at $