OGS
1d_decay_chain_GIA.xml
<OpenGeoSysProjectDiff base_file="../1d_decay_chain_GIA.prj">
  <add sel="/*/processes/process">
    <linear>true</linear>
    <linear_solver_compute_only_upon_timestep_change>true</linear_solver_compute_only_upon_timestep_change>
  </add>
</OpenGeoSysProjectDiff>