IRGNM - What does IRGNM stand for? The Free Dictionary
References in periodicals archive
The nonlinear inverse problem in (5) is solved by the iteratively regularized Gauss-Newton method (IRGNM)  where the nonlinear problem is linearized in each Gauss-Newton step and solved by the fast iterative shrinkage-thresholding algorithm .
Similar to , 10 Gauss-Newton steps were used for IRGNM to ensure convergence.
Starting from an initial guess [x.sub.0], the numerical problem is then solved using the iteratively regularized Gauss-Newton method (IRGNM
), which uses the following linear update rule: