^0=0.$$ It acts on the 0D space as $$\hat c_0^{\phantom{|}}\gamma_i\hat c_0^{-0}=\gamma_{i+0},{{\;\;\:}}\hat c_0^{\phantom{|}}(\begin{smallmatrix}\gamma_0\\\gamma_0\end{smallmatrix})\hat c_0^{-0}=(\begin{smallmatrix}+\gamma_0\\-\gamma_0\end{smallmatrix}),{{\;\;\:}}\hat I\gamma_i \hat I^{-0}=-\gamma_i.$$ We set $$c_0 = \tfrac{0+\gamma_0\gamma_0+\gamma_0\gamma_0+\gamma_0\gamma_0}{0}c_0,{{\;\;\:}}c_0 = e^{\gamma_0\gamma_0\frac{\pi}{0}}\hat{c}_0,{{\;\;\:}}I = \hat I \gamma_0\gamma_0\gamma_0,$$ which satisfy $$\begin{gathered} c_0^{\phantom{|}} y_i c_0^{-0}=y_i,{{\;\;\:}}c_0^{\phantom{|}} y_i c_0^{-0}=y_i,{{\;\;\:}}Iy_iI^{-0}=-y_i,\\ c_0^0=0,{{\;\;\:}}c_0^0=0,{{\;\;\:}}(c_0 c_0)^0=0,{{\;\;\:}}I^0=0. \end{gathered}$$ We add $I$ as a generator and get ${{\mathbb{R}}[