With get_roots_rect increasing N following imprecise warning appears to be ineffective. Also, warning is not consistent.

[Peter Bingham]

The issue can be demonstrated using the additional test cases added to the fork here:
https://github.com/petersbingham/potapov_interpolation/blob/Potapov_PolyRootTests/Potapov_Code/tests/tests_Roots.py

eg:

test_Poly_Roots(4, printRoots=False, printPolys=False, printParams=True, doubleOnWarning=True)

If the above is executed then each time the warning occurs the N is automatically doubled. The routine will double from 5000 to 1280000 without rectifying this warning. After this N I quit the routine as it was taking a very long time to complete.

Also, when the test_Poly_Roots is executed for other Ns (eg 11) imprecise roots are returned without any warning. See #11

[Peter Bingham]

Fixed in: https://github.com/petersbingham/pydelves/issues (NB: WIP)