[行列解析4.5.P25]

\Gamma_k^{-T} \Gamma_k =
\begin{pmatrix}
\vdots & \vdots & \vdots & \vdots & \vdots \\
-1 & -1 & -1 & -1 & \\
 1 &  1 & 1  &      & \\
-1 & -1 &    &      & \\
1  &     &    &      & 
\end{pmatrix} \\
\Gamma_k = (-1)^{K+1}
\begin{pmatrix}
1 & 2 &      &     \text{★} &\\
  &  1 &  \ddots   &        & \\
  &     &  \ddots  &   2   & \\
  &     &      &  1       & 
\end{pmatrix}