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MathMartin (talk | contribs) added formal definition, reordered topics, rewrote introduction |
MathMartin (talk | contribs) m cleaned up == Examples == |
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Line 82:
\end{pmatrix}</math>
is lower triangular.
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added formal definition, reordered topics, rewrote introduction |
m cleaned up == Examples == |
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Line 82:
\end{pmatrix}</math>
is lower triangular.
|