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Boldfaced vector variables |
better example IMO, common misconception is that all elements of principal diagonal must be zero but it's not true. All elements may also be zero and it would still qualify the definition of the subject |
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Line 6:
\left[\begin{smallmatrix}
6 & 0 & 0 \\
0 &
0 & 0 &
\end{smallmatrix}\right]</math>. An [[identity matrix]] of any size, or any multiple of it (a [[#Scalar matrix|scalar matrix]]), is a diagonal matrix.
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