A determinant whose only nonzero elements occur in square blocks centered about the principal diagonal is in block-diagonal form.
仅有的非零元素集中于主对角线的方块中的行列式是分块对角形式的。
We showed that a determinant in diagonal form is equal to the product of the diagonal elements.
我们已证明一对角形行列式等于其对角元素的乘积。
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