package: pari
version: 2.8.0 ([2, 8, 0, 18811, "5aa4c02"])
> polrootsreal(3*x^3 - 4*x^2 + 3*x - 1)
*** at top-level: polrootsreal(3*x^3-4
*** ^--------------------
*** polrootsreal: impossible inverse in divrr: 0.E-19.
*** Break loop: type 'break' to go back to GP prompt
Charles Greathouse
Analyst/Programmer
Case Western Reserve University