Sets the number L of additional residual minimization steps for the BiCGSTABL solver. Default is 2. This option is only available for the BiCGSTABL and the IDRSTABL solver which is part of the unsupported Eigen modules that are available through OGS_USE_EIGEN_UNSUPPORTED CMake option.

See following links for detail description:

"Detailed Description" in https://libeigen.gitlab.io/docs/unsupported/

Additional info

From MathLib/LinAlg/Eigen/LinearSolverOptionsParser.cpp line 91

This is an optional parameter.
Data type: int
Expanded tag path: linear_solvers.linear_solver.eigen.l
Go to source code: → ogs/ogs/master

Used in the following test data files

Used in no end-to-end test cases.