For the group (mathrm{SO}(3)), find the metric tensor (7.19) and show that (mathrm{SO}(3)) is compact and semisimple.

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For the group \(\mathrm{SO}(3)\), find the metric tensor (7.19) and show that \(\mathrm{SO}(3)\) is compact and semisimple. Use the metric tensor to construct the Casimir operator. Hint: The SO(3) algebra has been put in the form (7.18) in Problem 7.4 .

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