MSG 83.49

\[\begin{align*} &E_{2}^{1,-1}=\mathbb{Z}\\ &E_{1}^{0,-1}=0\\ &E_{1}^{1,-1}=\mathbb{Z}[\boldsymbol{b}^{(1)}_{e_1}]\oplus\mathbb{Z}[\boldsymbol{b}^{(1)}_{e_3}]\\ &E_{1}^{2,-1}=2\mathbb{Z}[\boldsymbol{b}^{(2)}_{\gamma _1}]\oplus2\mathbb{Z}[\boldsymbol{b}^{(2)}_{\delta _1}] \end{align*}\]

\[\begin{align*} &[X^{(1)}]^{-1}=\left( \begin{array}{cc} e_1 & e_3 \\ 1 & 1 \\ 0 & 1 \\ \end{array} \right)\\ &[V^{(1)}]^{-1}=\left( \begin{array}{cc} e_1 & e_3 \\ 1 & 1 \\ 0 & 1 \\ \end{array} \right)\\ &\Sigma^{(1)}=\left( \begin{array}{cc} 1 & 0 \\ 0 & 0 \\ \end{array} \right) \end{align*} \]