On 10/10/2016 10:05 AM, Edith Sotelo wrote:
You are right. My system has a non zero RHS after imposing the Dirichlet BC.  
That was my bad.

CG still works, just slow though.

So what is the equation and the preconditioner you use?
Best
 W.

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Wolfgang Bangerth          email:                 [email protected]
                           www: http://www.math.colostate.edu/~bangerth/

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