$$
	\mathbf{i}
	\boldsymbol{\hat{\mathrm{\imath}}}
	\mathbf{j}
	\boldsymbol{\hat{\mathrm{\jmath}}}
	\mathbf{k}
	\boldsymbol{\hat{k}}
$$

%% ----------------------------------------------------------------
\newpage

\begin{tabular}{|l|c|c|}

\hline
	{} &
	Orientable &
	Non-orientable \\

\hline
	{} &
	$\chi=2-2g$ &
	$\chi=2-g$ \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline
\hline
	$g=0$ &
	$\S^2$ &
	$\P^2$ \\

\hline
	$\pi_1:$ &
	$0$ &
	$\pig{a \mid a^2}=\Z_2[a]$ \\

\hline
	$H_0:$ &
	$0$ &
	{} \\

%
	$H_1:$ &
	{} &
	{} \\

%
	$H_2:$ &
	{} &
	{} \\

\hline
	$H^0:$ &
	{} &
	{} \\

%
	$H^1:$ &
	{} &
	{} \\

%
	$H^2:$ &
	{} &
	{} \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline
	$g=1$ &
	$\T^2$ &
	$\P^2\#\P^2$ \\

\hline
	$\pi_1:$ &
	$\pig{a,b\mid [a,b]}$ &
	$\pig{a_1,a_2 \mid a_1^2 a_2^2}$ \\

\hline
	$H_0:$ &
	{} &
	{} \\

%
	$H_1:$ &
	{} &
	{} \\

%
	$H_2:$ &
	{} &
	{} \\

\hline
	$H^0:$ &
	{} &
	{} \\

%
	$H^1:$ &
	{} &
	{} \\

%
	$H^2:$ &
	{} &
	{} \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline
\hline
	$g=2$ &
	$\T^2\#\T^2$ &
	$\P^2\#\P^2$\#$\P^2$ \\

\hline
	$\pi_1:$ &
	$\pig{a_1,b_1,a_2,b_2\mid [a_1,b_1][a_2,b_2]}$ &
	$\pig{a_1,a_2,a_3 \mid a_1^2 a_2^2 a_3^2}$ \\

\hline
	$H_0:$ &
	{} &
	{} \\

%
	$H_1:$ &
	{} &
	{} \\

%
	$H_2:$ &
	{} &
	{} \\

\hline
	$H^0:$ &
	{} &
	{} \\

%
	$H^1:$ &
	{} &
	{} \\

%
	$H^2:$ &
	{} &
	{} \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline
\hline
	$g=3$ &
	$\T^2\#\T^2$\#$\T^2$ &
	$\P^2\#\P^2$\#$\P^2\#\P^2$ \\

\hline
	$\pi_1:$ &
	$\pig{a_1,b_1,a_2,b_2,a_3,b_3\mid [a_1,b_1][a_2,b_2][a_3,b_3]}$ &
	$\pig{a_1,a_2,a_3,a_4 \mid a_1^2 a_2^2 a_3^2 a_4^2}$ \\

\hline
	$H_0:$ &
	{} &
	{} \\

%
	$H_1:$ &
	{} &
	{} \\

%
	$H_2:$ &
	{} &
	{} \\

\hline
	$H^0:$ &
	{} &
	{} \\

%
	$H^1:$ &
	{} &
	{} \\

%
	$H^2:$ &
	{} &
	{} \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline
	$\ldots$ &
	$\ldots$ &
	$\ldots$ \\

%% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
\hline

\end{tabular}

