Make AMD Ordering numerically more robust
Submitted by Gael Guennebaud
Assigned to Nobody
Link to original bugzilla bug (#751)
Description
See this thread: http://forum.kde.org/viewtopic.php?f=74&t=106962
AMD introduces zeros at the beginning of the diagonal which is pretty bad. Ideally, SimplicialLDLT could even do numerical pivoting, either dynamically (difficult) or statically.