On 8/25/25 14:03, Bald Eagle wrote:
> 
> Just came across this article the other day.
> 
> I just skimmed this, so don't know if this will be a big help or not:
> 
> http://codebase.cemyuksel.com/soln/using_cypolynomial.html
> 
> Hopefully it's something you can easily and productively make use of.
> 
> - BW
> 

Thanks for the reference. On the surface it looks like not much new, but 
I didn't read the referenced paper.

The yuqk fork implements new New-Raphson solvers as lambda functions to 
polish roots internal to the solve_cubic(), solve_quartic() and 
polysolve() solvers. The method long used elsewhere in the POV-Ray 
source code too. The superellipsoid shape at least & more. Been too long 
(6-7 years) since I was heavily into re-fining the solvers.

Bill P.

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