| Line 650: |
Line 650: |
| | | | | | |
| | <math>\begin{matrix} | | <math>\begin{matrix} |
| − | \underline{X}_i & = & \{ (\underline{x}_i), \underline{x}_i \} | + | \underline{X}_i & = & \{ \texttt{(} \underline{x}_i \texttt{)}, \underline{x}_i \} |
| | \\ | | \\ |
| | & \cong & \mathbb{B} | | & \cong & \mathbb{B} |
| Line 656: |
Line 656: |
| | | | | | |
| | <math>\begin{matrix} | | <math>\begin{matrix} |
| − | A_i & = & \{ (a_i), a_i \} | + | A_i & = & \{ \texttt{(} a_i \texttt{)}, a_i \} |
| | \\ | | \\ |
| | & \cong & \mathbb{B} | | & \cong & \mathbb{B} |