[GiNaC-devel] multivariate factorization (ginac/ginsh)

Hi Jörg, Am 21.02.2010 08:59, schrieb Joerg Arndt:

[could someone please forward to ginac-devel, I am not subscribed there]

I am also reading cln-list :-)

# but it appears to do multivariate factorization as well:

yes it does.

# The following seems to take forever:

...

t; -E20^16*E4^8*E5^8*E1^16*q^4-(E10^24-E20^8*E5^16)*E4^16*E1^8+E2^24*E20^16*E5^8*q^4 factor(t);

# ctrl-C ginsh 815.46s user 3.39s system 94% cpu 14:26.22 total

Is the latter a huge-ish task or does ginac have a performance issue here?

I ran the example and I get an exception! So, it seems there is a bug somewhere. I'll have a look at it. Regards, Jens