No pictures or diagrams were allowed, and, much as I wanted to write "n n " to describe the dimensions of a matrix in my thesis, it had to be "n-by-n".
Walang larawan o diagram ay pinahihintulutan, at, marami bilang I isulat ang "nn" para ilarawan ang mga sukat ng isang matris sa aking sanaysay, ito ay upang maging "n-by-n".