.  ![Eigenvalues for a problem with a small number of DoFs without system noise.\ The algorithms are almost identical in (a) and (b).](pone.0000000.g000){#pone.0000000.g000}  ![Eigenvalues for multiple runs of a problem with a small number of DoFs without system noise, where the seed for the random number is different for multiple runs.](pone.0000000.g000){#pone.0000000.g000}  