RPL integral : 28S vs 48GX (fail to call a program)

[jonmoore]

AFAIK, the 49/50g integral routines are different than those in the 48 series. The 49/50 series use improved versions of the Erable/ALG-48 integral routines that were available as third party addons for the 48 series.

Whether the 28S and 48's default integral routines are the same, that's less obvious. These days I use my 50g or Prime G2 for most CAS duties. I enjoy programming numeric stuff on my 28S as I love its form factor, but it's symbolic capabilies are too limited (although it was arguably the first handfeld calculator to feature symbolic math capabilities, and that made it best in class when the 28C was first released).