On 03/06/2017 06:04 PM, hanks0...@gmail.com wrote:

It seems that the error is greatly reduced... So, It seems that I can't ignore
this difference.

Could you please explain to me what makes this big difference??

Reinit is equivalent to
* resize
* set contents to zero
In your case, the resizing is unnecessary because the system has the same size. But you could try to just set matrices and vectors to zero, and see whether that makes a difference.

Best
 W.


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Wolfgang Bangerth          email:                 bange...@colostate.edu
                           www: http://www.math.colostate.edu/~bangerth/

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