[Scipy-tickets] [SciPy] #492: Problem in linalg.svd ?

SciPy scipy-tickets@scipy....
Fri Aug 31 10:36:58 CDT 2007


#492: Problem in linalg.svd ?
--------------------------+-------------------------------------------------
 Reporter:  Mark Poolman  |       Owner:  somebody
     Type:  defect        |      Status:  new     
 Priority:  normal        |   Milestone:  0.6     
Component:  scipy.linalg  |     Version:          
 Severity:  normal        |    Keywords:          
--------------------------+-------------------------------------------------
 There appears to be a problem in svd results for certain large matrices,
 as demonstrated by use of svd to calculate a kernel. Briefly, for some
 matrices if k = kernel(a) we find a.k != 0. This has been seen with some,
 but not all,
 combinations of various flavours of ubuntu and x86_64 and i686 hardware.

 A more complete description is here:
 https://bugs.launchpad.net/ubuntu/+source/python-scipy/+bug/134277

-- 
Ticket URL: <http://scipy.org/scipy/scipy/ticket/492>
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