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Benedict Irwin edited section_Alternative_Interpretation_An_important__.tex
almost 9 years ago
Commit id: 06380b840e5303c440dc792e1cd02b79644255ac
deletions | additions
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--- a/section_Alternative_Interpretation_An_important__.tex
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\end{equation}
which means for this particular instance, matrix multiplication has become matrix addition. (However, this rule also does not appear to generally hold).
The above matrix resembles another matrix which when squared is twice itself \begin{equation}
\begin{bmatrix}
1&0&0&1\\0&1&1&0\\0&1&1&0\\1&0&0&1
\end{bmatrix}
\cdot
\begin{bmatrix}
1&0&0&1\\0&1&1&0\\0&1&1&0\\1&0&0&1
\end{bmatrix}
=
\begin{bmatrix}
2&0&0&2\\0&2&2&0\\0&2&2&0\\2&0&0&2
\end{bmatrix}
\end{equation}
This matrix is also an invariant under the transform $T$, whereas the first is not!