Chosen parameters are detailed below.
We have stopped the GMRES every 30
iterations (\emph{i.e.}, $max\_iter_{kryl}=30$), which is the default
-setting of GMRES restarts. $s$, for its part, has been set to 8. CGLS
+setting of GMRES restart parameter. $s$, for its part, has been set to 8. CGLS
minimizes the least-squares problem with parameters
$\epsilon_{ls}=1e-40$ and $max\_iter_{ls}=20$. The external precision is set to
$\epsilon_{tsirm}=1e-10$. These experiments have been performed on an Intel(R)
