Timeline for Does the equation $\mathbf{I} = \sum_{k=1}^{m} \mathbf{U} \mathbf{B}_k \mathbf{U}^T\mathbf{A}_k$ have a special name or solution?
Current License: CC BY-SA 3.0
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| Nov 20, 2016 at 18:13 | comment | added | Markus Sprecher | Not sure if it helps but with a formula from en.wikipedia.org/wiki/Vectorization_(mathematics) the equation becomes equivalent to $$vec(X^{-1})=\left(\sum_k A_k^T \otimes B_k\right)vec(X^T)$$ where $vec\colon \mathbb{R}^{3\times3}\rightarrow \mathbb{R}^{9}$ denotes the vectorization. | |
| Nov 20, 2016 at 12:20 | comment | added | Carlo Beenakker | in relation to your previous similar question: please don't delete questions after you have received a lot of feedback, in consideration for others who might benefit from that feedback --- mathoverflow.net/questions/255081/… | |
| Nov 20, 2016 at 12:11 | review | First posts | |||
| Nov 20, 2016 at 12:38 | |||||
| Nov 20, 2016 at 12:10 | history | asked | Hadi Asheri | CC BY-SA 3.0 |