![A matrix is singular if its rows are arithmetic sequences](https://blogs.sas.com/content/iml/files/2017/01/ProgrammingTips-2.png)
Look at the following matrices. Do you notice anything that these matrices have in common? If you noticed that the rows of each matrix are arithmetic progressions, good for you. For each row, there is a constant difference (also called the "increment") between adjacent elements. For these examples: In the