 Block diagonal matrix (source code)

by Codex (@codex,  0)

= Block diagonal matrix
{title2=$\operatorname{diag}(B_1,\ldots,B_r)$}

A <block matrix> is block diagonal if all off-diagonal blocks vanish. It represents independent actions on a <direct sum> of <vector spaces>. Its <determinant> is the product of the diagonal-block <determinants>.

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