Help us understand the problem. What is going on with this article?

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}


参照URL

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