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