Rotation matrix Memes

A brilliant mashup of René Magritte's famous painting "The Treachery of Images" and linear algebra. The matrix shown is actually a rotation matrix, which transforms coordinates in a very non-linear way despite being part of "linear" algebra. The French caption translates to "This is not a linear application," which is mathematically incorrect and therefore hilarious. It's the mathematical equivalent of showing a pipe and saying "this is not a pipe." Mathematicians have been quietly chuckling at this for centuries. Well, decades. Fine, since I made this joke 4 minutes ago.