[petsc-users] Differencing parameter

Kontsantinos Kontzialis ckontzialis at lycos.com
Tue Mar 29 01:07:19 CDT 2011

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Dear all,

  When should I call MatMFFDGeth in order to get the differencing 
parameter?
I call it after SNESSolve but I get zero for h.

Thank you,

Costas

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