On Saturday, February 7, 2026 at 10:53:27 PM UTC+1 wrote:
I find Sage's permutation groups a bit weird. Old GAP interface was slow, so there were some Cython classes written, and then libgap came along... Can you do your computations in "pure" libgap groups? Probably. But then I couldn't benefit from the stuff in Sage implemented for Weyl groups. I would have to learn the GAP equivalents. That's probably not too hard, but since there is a workaround for the bug (albeit an inconvenient one for large groups) I think I'll stick with that. Best, Michel I.e. convert W into libgap(W), then these conversions from libgap permutations to W's permutations aren't even necessary. I am aware of one potentially serious libgap interface bug, which might be playing up here - calls to libgap functions, which pass handles to GAP objects, might get optimised by the compiler, and break things, unless they are declared volatile. And the latter is only done in few places so far - see e.g. sage issue #37026 Dima -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/sage-support/f4ccc08a-ee68-4d1d-a262-3395ff1c386an%40googlegroups.com.
