Table of Contents
1 diagonal of a matrix def
The diagonal of an n-by-n matrix is all the entries of the form \(a_{i,i}\) for \(0 < i \leq n\) \[\begin{aligned}
\begin{pmatrix}x &&\\&\ddots&\\&&x\end{pmatrix}\end{aligned}\]
The diagonal of an n-by-n matrix is all the entries of the form \(a_{i,i}\) for \(0 < i \leq n\) \[\begin{aligned}
\begin{pmatrix}x &&\\&\ddots&\\&&x\end{pmatrix}\end{aligned}\]