Hi just a quick question. Can a anti-diagonal have zero in its diagonal? I have this definition in my paper.
"An anti-diagonal matrix is a square matrix where all the values are zeroes except those on the anti-diagonal, i.e. those running from the lower left corner to the upper right corner. There is no restriction on what values can appear on the anti-diagonal. "
The 1st and last line are confusing to whether a zero is valid in the diagonal