Formula_17560

\[\left.\begin{array}{c}{\left[j_{0 \pm}^{k}(x), j_{0 \pm}^{l}\left(x^{\prime}\right)\right]_{x_{0} \neq x_{0}^{\prime}}=i \delta\left(\boldsymbol{x}-\boldsymbol{x}^{\prime}\right) f^{k l m} j_{0}^{m}(x),} \\{\left[j_{0 \pm}^{k}(x), j_{0 \pm}^{l}\left(x^{\prime}\right)\right]_{x_{0}=x_{0}^{\prime}}=0,}\end{array}\right\}\]