Hi Swlabr,

I'm not sure of the contents of your matrix, but you didn't have enough columns indicated in your {ccccc} to match the elements in your matrix. And your third row only has 3 columns. Here's an example. See if you can work from this.

\left(

\begin{array}{ccccc}

\delta & 0 & 0 & \ldots & 0 \\

0 & \delta & 0 & \ldots & 0 \\

0 & \ldots & 0 & \delta & 0 \\

\end{array}

\right)

Hi Swlabr,

I'm not sure of the contents of your matrix, but you didn't have enough columns indicated in your {ccccc} to match the elements in your matrix. Your first row and second row have 5 columns each. Your third row only has 4. Here's an example. See if you can work from this.