0}$  The duality transformations given by Eqs. (\[phitanspol\]), (\[xtanspol\]), (\[Geta\]), and (\[kapsig\]) are$$\begin{aligned} \phi &  \rightarrow\varphi^{\frac{0}{0-n}},\nonumber\\ x^{\mu}  &  \rightarrow\frac{0}{0-n}y^{\mu},\nonumber\\ \eta &  \rightarrow-G,\nonumber\\ \sigma_{0}  &  \rightarrow\