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Results tagged with block-matrices
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user 98093
8
votes
0
answers
570
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A rank inequality
Suppose
$$M := \begin{bmatrix}
M_{11} & \cdots &M_{1d} \\
\vdots & \ddots & \vdots \\
M_{d1} & \cdots & M_{dd}
\end{bmatrix}$$
is a $d \times d$ block matrix such that
$$M_{jk} = \sum_{i=1}^{r}(A_ …
- 500