s are somewhat
unclear.
Yours，
FU
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To u
Hi，
AT+BFT^4=C
A, B, F are sparse matrices.
How to solve this nonlinear problem?
What kind of weak form is simplified?
And if I just want to get a vector of Jacobi matrices, what should I do?
Best，
FU
在 2018年11月20日星期二 UTC+8下午10:08:26，Wolfgang Bangerth写道：
>
> On 11/19/18 11:59 PM, FU
How to get the derivative of a vector?
Jacobian matrix of vectors
T^4 is a vector.
How do we get the Jacobi matrix of this vector?
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Dear Jean-Paul,
Thank you very much for your help. According to your prompt, after many
reflections in the past two days, I have come up with a solution, but it
has not been verified yet.
With new progress, I will communicate with you again.
Thanks again for your help.
Best，
FU
在 2018年11月16日星
Hi，
I want to solve AT+BFT^4=C (1),
A, B, F are sparse matrix, T, T^4 are the solution vector.
By Newton method, we need to (1) derivation.
So I want to know how to get A.
Or what do you think of solving this equation?
best，
FU
在 2018年11月15日星期四 UTC+8下午10:45:24，Jean-Paul Pelteret写道
want to get in the end, where N and M are
sparse matrices.
What else can you do to solve this problem?
Thank you
FU在 2018年11月14日星期三 UTC+8下午2:32:03，Jean-Paul Pelteret写道：
>
> Hi,
>
> To compute the sparse matrix inverse M^{-1} you would have to use a direct
> solver such as Spar
want to get in the end, where N and M are
sparse matrices.
What else can you do to solve this problem?
Thank you
FU在 2018年11月15日星期四 UTC+8上午4:26:18，Wolfgang Bangerth写道：
>
> On 11/13/2018 11:32 PM, Jean-Paul Pelteret wrote:
> >
> > To compute the sparse matrix inverse M^{-1}
非常感谢您的回复。
我可能理解你提到的方法，但是在我要求的解决方案的稀疏矩阵后面没有乘法向量。
A = M-（N ^ T）（M ^ -1）N，
这是原始稀疏矩阵的构造方程。
A是我想在最后获得的稀疏矩阵，其中N和M是稀疏矩阵。
你还能做些什么来解决这个问题？
谢谢
FU
在 2018年11月14日星期三 UTC+8下午2:32:03，Jean-Paul Pelteret写道：
>
> 嗨，
>
> 要计算稀疏矩阵逆M ^ { - 1}，您必须使用直接求解器，例如 SparseDirectUMFPACK
> <https:
(M^-1)N,
M and N are sparse matrix,
so how to get the inverse of a sparse matrix?
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