# Tag Info

The inverse of $D$ will form a matrix such that The diagonal of the inverse of $D$ is $1$ (for $i=1,2,...n$) $$D(i,i) = 1$$ and for $i=1,2,...n-1$ $$D(i,i+1) = -1$$ and the rest of the values of the inverse of $D$ are zero. Example (using $n=5$)  D^{-1} = \begin{bmatrix} 1 & 0 & 0 & 0 & 0 \\ -1 & 1 & 0 & 0 & 0\\ 0 &...