[GiNaC-list] expand conundrum

[Krishna Mohan Gundu]

> I can consider many possible reasons but could not come up with an answer
>
> 1) The part is actually expanded but somewhere it is being gathered
> again. Not likely, as my code does not override the gather function.
> 2) GiNaC thinks it cannot be expanded for some reason
>   a) GiNaC refuses to expand due to restrictions on the depth of the
> tree? (not likely, the depth is too small)
>   b) GiNaC refuses to expand cause it thinks the product may not be
> distributive? (likely, but i dont know)
>   c) GiNaC thinks its an atom but the output fools me into believing
> it is not an atom?

I figured this out. The problem was with my understanding of the
expand() behavior. I was expecting it to recurse until the expand no
longer leads to any more expansion. Now I realize that not recursing
should be the default and optimal behavior.