preconditioner-comparison.tex (723B)
1 \begin{tabular}{lllll} 2 \toprule 3 & Rank & Speed & Closeness & Inversion \\ 4 \midrule 5 \(\bm \nabla\T \bm \nabla\) & 1 & Very fast & Bad & Closed-form \\ 6 \(\sum_i \bm J_i\T \bm H_i \bm J_i\) & Flexible, implicit & Slow & Arbitrarily close & Conjugate Gradient \\ 7 \(\bm J\T \bm H \bm J\) & \(O\) & Fast & Okay & Woodbury \\ 8 \(\bm L\T \bm L\) & Flexible, explicit & Fast (precomputable) & Good & Woodbury \\ 9 \bottomrule 10 \end{tabular}