Re: [sage-support] Out of memory error when dividing vector by scalar
Indeed, the problem seems to still be present in 5.2rc1. I've tracked the call to basis() back to an inefficient implementation of gen() in FreeModule_ambient (apparently the coercion framework ends up calling an_element() which in turn ends up calling gen()). It seems easy enough to fix. I made a ticket and a patch for this: http://trac.sagemath.org/sage_trac/ticket/13304 - Daniel -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
Re: [sage-support] Out of memory error when dividing vector by scalar
After some digging -- and a fortuitous control-C at the right moment -- it looks like it's trying to construct the basis for the ambient free module. This will be a list of 10^4 vectors, each 10^4 elements long, so it's not surprising it takes a lot of memory.. adding a print statement in the loop in FreeModule_ambient.basis seems to confirm that's the issue. Unfortunately suggesting how to get around this requires a deeper understanding of Sage internals than I have. :-/ Doug -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
