Definition 41.4.8 (Matrix Unit).label Let $n \in \natp$, $\seqf{e_j}$ be the standard orthonormal basis for $\complex^{n}$, and $1 \le i, j \le n$, then the $(i, j)$-th matrix unit is the operator $E_{ij}= e_{j} \otimes e_{i}$.
Definition 41.4.8 (Matrix Unit).label Let $n \in \natp$, $\seqf{e_j}$ be the standard orthonormal basis for $\complex^{n}$, and $1 \le i, j \le n$, then the $(i, j)$-th matrix unit is the operator $E_{ij}= e_{j} \otimes e_{i}$.
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