\[\mathsf{Q}^{\mu}_{\nu}\left(x\right)=\tfrac{1}{2}\Gamma\left(\nu+\mu+1\right)%
\left(e^{-\mu\pi i/2}\boldsymbol{Q}^{\mu}_{\nu}\left(x+i0\right)+e^{\mu\pi i/2%
}\boldsymbol{Q}^{\mu}_{\nu}\left(x-i0\right)\right),\]