Mathematical Jokes

[bo198214]

I didn't think of anything funny for e to say, though.

Perhaps another joke for this topic:

A differential operator is standing at a bar. There comes a function along. The operator says: "Hey, how about differentiating you?!". The function answers: "I dont care, I am \( e^x \) !".
(And in some versions the joke even continues as the differential operator says: "Haha, and I am \( \frac{\partial}{\partial y} \) !!!".)