Hello,
I am looking to find a closed-form formula for the following commutator
[J_{-}^{n},J_{+}^{k}]
where the operators are raising and lowering operators of the \mathfrak{su}(2) algebra for which [J_{+},J_{-}]=2J_0 and [J_{0},J_{\pm}]=\pm J_{\pm}
I've already made some progress and I...