Question about HP-15C Integrals

[jonmoore]

(06-01-2023 06:29 AM)Ángel Martin Wrote:  FWIW there's a recursive implementation of SOLVE and INTEG for the HP-41 that is capable of dealing with double integrals and with 2-variable function root finding. They are available on TOS and here: https://www.systemyde.com/pdf/Advantage_Math_Manual.pdf

I can highly recommend Ángel's excellent routines in his Advantage Math ROM. I use this ROM on the DM41X regularly.

It's important to know that you also have to have Ángel's equally excellent SandMath, 41Z (complex math) and SandMatrix ROMs installed on your 41 device of choice, but both Systemyde's custom 41 hardware extension of the original 41, and the DM41X make it easy to reconfigure your 41 ROM's on the device itself.

Ángel's ROMs make up a clean sweep of my DM41X ROM map slots, and I swap out his HP16 emulation ROM for the Advantage Math ROM, when I want to dabble with his excellent extensions to SandMath, 41Z and SandMatrix.