CAS Vars and integrals

[Albert Chan]

Hi, robmio

I did try OP code. Global t is not affected.

CAS> purge(t)               → "No such variable t"
CAS> Beta_r(1,2,3)       → 1/12
CAS> t       → t

CAS> t := 99
CAS> Beta_r(1,2,3)       → 1/12
CAS> ∫(t^3, t = 0 .. 1)  → 1/4
CAS> t       → 99

Definite integral variable (and function arguments) are supposed to be local.
Requiring LOCAL for these is a bug, and should be fixed.

In the meantime, a hard reset should do the trick.
see https://www.hpmuseum.org/forum/thread-16...#pid148129