Problem with rectangular matrices

Jed Brown jed at
Tue May 26 12:29:16 CDT 2009

Matthew Knepley wrote:

> It not computing Ab. Its computing Ab, A^2b, A^3b, etc.

Of course, but that's all possible if A*b is computable.  Lisandro
demonstrated that A*x was fine, which it better be because of how x was
obtained.  Had he tried A*b, which is the first thing the KSP needs, the
problem would have been obvious.


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