"Useless" by XKCD

This comic is also known as "The Love Equation", and might be one of the most famous XKCD comics.

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2 comments

Look at the equation on the middle right. That kind of matrix with only 1s on the diagonal and 0s everywhere else is called an Identity matrix. So the equation is the identity matrix multiplied by love.
- I passed Calculus and I didn't realize the identity equation until now. I think that says a lot about how little I actually get maths.