is/levmar/" target="_blank">LevMar</a> libraries and the acceleration and delayed gratification approaches proposed by <a href="http://link.aps.org/doi/10.1103/PhysRevE.83.036701" target="_blank">Transtrum et al 2011</a> (<a href="presentations/Leif_LM_presentation_m.pdf">presentation</a>)</li>
<li>highly-parameterized inversion where the number of model parameters is substantially greater than the number of model constraints (calibration targets or model observations); a similar approach is called <a href=