Wikipedia:Reference desk/Science: Difference between revisions
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== Angular momentum ==
My textbook derives the relationship [J<sub>x</sub>, J<sub>y</sub>] = ihJ<sub>z</sub> (I can't make h bars) by defining the J's as the generator of their respective Rotation operators...but only for the Rotation operators in regular Euclidean space (ie <math> R(\theta
\cos\theta & -\sin\theta & 0 \\
\sin\theta & \cos\theta & 0 \\
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