What is the standard notation for the diagonal of a matrix? I believe it is $\displaystyle \Delta$, as with the cartesian product, but I am not sure.
If so, is there another notation for it? As I'm using $\displaystyle \Delta$ for something else...
What is the standard notation for the diagonal of a matrix? I believe it is $\displaystyle \Delta$, as with the cartesian product, but I am not sure.
If so, is there another notation for it? As I'm using $\displaystyle \Delta$ for something else...