On Oct 4, 2007, at 1:35 PM, Joel B. Mohler wrote: > On Thursday 04 October 2007 15:38, Robert Bradshaw wrote: >> Craig's reply is a good summary of what I was going to say. I'm >> getting an >> >> abort: unknown parent e91367eb18c1! > > Well, it looks like William succeeded in looking at it as the patch is > changed.
Maybe I just didn't pull recently enough... (did an -upgrade though). > Craig mentioned the call to MatrixSpace is because multiplication > of a matrix > with QQ entries happens in the ZZ space. I see that now, but it > wasn't the > only call to MatrixSpace. That is, multiplication of a matrix with ZZ > entries also called MatrixSpace (forgetting that sometimes we are > square and > can just use my existing parent). Yes. Hopefully your patch fixes this. > I'm glad the matrix coercion code changed! It truly looked a bit > frightening. Yeah, it was trying to handle each all sorts of things on a case-by- case basis between vectors and matrices... Now it's completely out of element.pyx, and is much shorter and easier to understand (implemented via Actions, where matrices act on vectors, etc.) - Robert --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://sage.scipy.org/sage/ and http://modular.math.washington.edu/sage/ -~----------~----~----~----~------~----~------~--~---
