\[\mathscr{W}\left\{{\mathbf{M}}\left(a,b,z\right),e^{z}U\left(b-a,b,e^{\pm\pi%
\mathrm{i}}z\right)\right\}=\ifrac{e^{\mp b\pi\mathrm{i}}z^{-b}e^{z}}{\Gamma%
\left(b-a\right)},\]