Oh, the perfect mathematical pun! In linear algebra, those small matrices labeled m 11 , m 12 , etc. are called "minors" - they're submatrices you get when you delete rows and columns from the original matrix. So the person is literally "touching minors" on their homework! The brilliance is in the double meaning that makes you do a double-take before realizing it's just innocent math. Linear algebra students everywhere are quietly snickering in the back of lecture halls right now!