Under a discrete space curve \(\gamma\) we understand a (finite or periodic) sequence \(\gamma_i\) of points in \(\mathbb R^3\). The \(i\)-th edge vector is then denoted by \(e_i = \gamma_{i+1} – \gamma_i\) and has length \(\ell_i = |e_i|\). If \(\ell_i\neq … Continue reading Tutorial 2 – Frames and tubes