subst()

[Igor Schein <igor@txc.com>]

Hi,

I remember seeing a recent subst() discussion, which I wasn't paying
attention to.  Now I see this behavior, which I don't like at all:

? p=x^2-x-1;
? \y
   simplify = 0 (off)
? type(subst(subst(p,x^2,x),x,x^2))
"t_INT"

I don't see how a transformation from a polynomial to an intereger can
be justified, but I'd be glad if someone could make sense out of it.

Thanks

Igor