(33S) Legendre Polynomials

[Thomas Klemm]

(05-20-2022 05:51 PM)Albert Chan Wrote:  What happens if x = 0 ? Which legendre kind get returned ?

If only there was an online emulator for the HP-25, with instructions on how to load a program:

Quote:As with my other HTML5 microcode emulators, tap the display (LED digits) to bring up more options.

(05-20-2022 05:51 PM)Albert Chan Wrote:  I would assume first kind (x = +0), since signed zero may not be supported.

If only polynomials were continuous and we could enter tiny numbers like \( -10^{-99} \) or \( 10^{-99} \), that would be great.

And if we only could understand the meaning of these instructions:

Code:

06: 24 01    : RCL 1
07: 15 51    : g x>=0
08: 13 21    : GTO 21

I highly recommend to consult the original contribution by James J. Davidson (547) in his neat handwriting.
It contains stack diagrams and comments that are helpful to understand the program.