[petsc-dev] [petsc-users] Any suggestion for this kinds of matrix?

[Barry Smith]

On Nov 10, 2011, at 5:12 PM, Mark F. Adams wrote:

> 
>> 
> 
> Would this problem also be fixed with -ksp_norm_type unpreconditioned ???
> 
> In that case you could make this the default for debug and not debug, which is cleaner (I've never figured out why you even offer preconditioned norm as an option, much less the default)
> 

   Someday I'll have to write a paper showing why :-)