rlmmac_update

EnRML (IES) without the prior increment term.

rlmmac_update

Regularized Levenburg-Marquardt algorithm for Minimum Average Cost (RLM-MAC) problem, following the paper: Luo, Xiaodong, et al. "Iterative ensemble smoother as an approximate solution to a regularized minimum-average-cost problem: theory and applications." SPE Journal 2015: 962-982.