[petsc-users] Size of off-diagonal matrix

[Barry Smith]

On Jun 22, 2011, at 9:02 AM, John Fettig wrote:

> On Wed, Jun 22, 2011 at 9:56 AM, Matthew Knepley <knepley at gmail.com> wrote:
>> It is compressed, so it only has columns that have a nonzero.
> 
> Thanks for answering so quickly.  I had just assumed that it would
> logically still report sizes that added up to the global column size
> so I was confused.

   What do you mean "report"? The sequential matrix that represents the off-diagonal part of the matrix actually does not contain the "zero columns" so does have fewer columns and hence the smaller number.

  Barry

> 
> John