We've been working on factoring polynomials in FLINT very intensively the last couple months. So we've been making floating point LLL in FLINT. During the process I just discovered what I thought was my bug but is actually a bug in fpLLL which means it's a bug in SAGE too.
Here's a simple lattice which triggers the bug on my 32 bit machine. (It's the zero rows which are not handled cleanly causing it to size reduce in very odd ways...) For a 64 bit machine I have a much larger example which breaks it. [[0 0 0 0 0] [0 0 0 0 0] [1 0 0 0 11] [0 1 0 0 47] [0 0 1 0 3748]] To test the bug in SAGE just run the following code: matrix([[0,0,0,0,0],[0,0,0,0,0],[1,0,0,0,11],[0,1,0,0,47], [0,0,1,0,3748]]).LLL() (This was on SAGE 4-1-1 the August 14th version.) -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org