When the roots are very close together the inversion becomes ill-conditioned. Exclude these cases from the random generation, test some corner cases with close roots and decrease the tolerance for root comparison.
Needs backport to releases 3.4
When the roots are very close together the inversion becomes ill-conditioned. Exclude these cases from the random generation, test some corner cases with close roots and decrease the tolerance for root comparison.
Needs backport to releases 3.4