行列
\[
A = \left(
\begin{array}{ccc}
a & b & c \\
d & e & f \\
g & h & i
\end{array}
\right)
\]
A = \left(
\begin{array}{ccc}
a & b & c \\
d & e & f \\
g & h & i
\end{array}
\right)
場合分け
\begin{eqnarray}
c_{k,l}=\left\{ \begin{array}{ll}
1 & (l=k) \\
\alpha & (|l-k|=1) \\
0 & (\text{上記以外}) \\
\end{array} \right.
\end{eqnarray}
\begin{eqnarray}
c_{k,l}=\left\{ \begin{array}{ll}
1 & (l=k) \\
\alpha & (|l-k|=1) \\
0 & (\text{上記以外}) \\
\end{array} \right.
\end{eqnarray}
ベクトル表記
\mathbf{V}
\mathbf{V}