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The identity matrix is the matrix for which a_ij = 1 when i = j, and 0 everywhere else. For example, in three dimensions, I = [[1 0 0 ; 0 1 0 ; 0 0 1]].

Here is a column vector: [[0 1 0]]'.


x \mapsto y_1...y_n


1/3


1 + 1 = 2
1 \leq 3 - 1
\leq 5


\begin{graph}
    rankdir=LR
    v_1
    v_1 -> v_2 
    v_2 -> v_3 
    v_3 -> v_1 
\end{graph}
 
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