[GiNaC-list] Re: Disabling flattening of sums and products?

[Ondrej Certik]

> > And GiNaC wants to 1) canonicalize the tree (expression), 2) make
> > the tree as flat as possible, so large expressions can be stored
> > reasonably well.
>
> Ok. (I think SymPy has a flag to switch behaviour on this one.)

SymPy works the same way as GiNaC, so it doesn't. Sympycore tries to
implement it,
but it's a lot of work and I personally don't think it's worth the pain.

Ondrej