Dear Benoit,
> On 16 Apr 2025, at 2:36 PM, NENNIG Benoit
> wrote:
>
> Dear petsc users,
>
> I need to compute the difference of two matrices M(nu) and M(nu+epsilon) to
> estimate the derivative of the matrix with respect to the parameter nu.
> Since only very few entries are modified by epsil
Dear petsc users,
I need to compute the difference of two matrices M(nu) and M(nu+epsilon) to
estimate the derivative of the matrix with respect to the parameter nu.
Since only very few entries are modified by epsilon, D = M(nu+epsilon) - M(nu)
contains many new zeros and I would like to remove
