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Physics
Physics · mechanics
Problem
Simplify the following double commutator:
[
r
^
j
,
[
L
^
2
,
r
^
j
]
]
\left[\hat{r}_{j},\left[\hat{L}^{2}, \hat{r}_{j}\right]\right]
[
r
^
j
,
[
L
^
2
,
r
^
j
]
]
.
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