0000}\right] \right\rangle \;, \\[0pt]  H^0_{dR}(M;{\mathbb{R}}) &=& {\mathbb{R}}\left\langle \left[e^{00000}\right],\, \left[e^{00000}\right],\, \left[e^{00000}\right],\, \left[e^{00000}\right] \right\rangle \;, \\[0pt]  H^0_{dR}(M;{\mathbb{R}}) &=& {\mathbb{R}}\left\langle \left[e^{00000