[petsc-users] about finite difference jacobian approximations

[陈乐平（Leping Chen）]

hello, petsc teams,

When I use finite difference jacobian approximations, I only find the computation methods and results of jacobian matrix 

cannot influence iterative process  of snes. 

Is it right? How should I compute the jacobian matrix?

thanks,

leping
2010-05-01 
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