Hello Wolfgang,
thanks for your message.
May I know if there is any method which can be used for adjoint
sensitivity method?
Best regards
Lance
On Thursday, June 22, 2023 at 7:29:18 PM UTC+2 Wolfgang Bangerth wrote:
> On 6/22/23 06:35, Lance Zhang wrote:
> >
> > May I know whether there is any other method to change the matrix with
> data
> > type BlockSparseMatrix<double> into a matrix with
> BlockSparseMatrix<double>?
>
> No. The inverse of a sparse matrix is, in general, not sparse. For all
> problems of a realistic size, even if you can store a matrix A, you will
> not
> be able to store A^{-1}. As a consequence, we never use the inverse of a
> sparse matrix in deal.II, and there are no functions to compute inverses
> of
> sparse matrices.
>
> Best
> W.
>
> --
> ------------------------------------------------------------------------
> Wolfgang Bangerth email: bang...@colostate.edu
> www: http://www.math.colostate.edu/~bangerth/
>
>
>
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