On 12/04/2017 12:43 PM, Wolfgang Bangerth wrote:
Can I figure out the pattern of B*B or BA^{-1}B ?
In general, A^{-1} is going to be a dense matrix even if A is a sparse
matrix. So building this matrix is not efficient.
Of course, you say that A is diagonal, in which case this doesn't
On 12/04/2017 12:04 PM, Peimeng Yin wrote:
I want to solve a linear system, which has the following form
(A+B A^{-1} B) u = f
Here A is a diagonal black matrix, B is a block matrix that I can figure
out the pattern. Are there any solver that I can use to solve the linear
system?
Yes. Have
I want to solve a linear system, which has the following form
(A+B A^{-1} B) u = f
Here A is a diagonal black matrix, B is a block matrix that I can figure
out the pattern. Are there any solver that I can use to solve the linear
system?
or
Can I figure out the pattern of B*B or BA^{-1}B ?
