HP’s Solve & Integrate-Still ahead of its time.

[brouhaha]

(10-29-2023 07:43 PM)Matt Agajanian Wrote:  I think the 34C uses Romberg method if I'm not mistaken.

The 34C, 15C, and the Advantage Pac for the 41 all use the Romberg method, with a transformation for non-linear sampling. The 15C Owner's Handbook and the 15C Advanced Functions Handbook, and Kahan's HP Journal article are the best references.

I suspect that the Saturn-based calculators that have numerical integration do the same, but I haven't looked.