Incomprehensible math jokes:

Q: What is lavender and commutes?
A: An Abelian semigrape.

Q: What’s yellow, linear, normed, and complete?
A: A Bananach space.

Q: What’s the value of a contour integral around Western Europe?
A: Zero, because all the Poles are in Eastern Europe.

Q: What do you get when you cross a mountain climber with a mosquito?
A. Nothing: you can’t cross a scaler with a vector.

Q: What’s hot, chunky, and acts on a polygon?
A: Dihedral soup.

Q: What sound does a drowning analytic number theorist make?
A: “Log log log log …”

Q: What’s sour, yellow, and equivalent to the axiom of choice?
A: Zorn’s lemon.

“Mathematicians are like Frenchmen,” wrote Goethe. “Whatever you say to them they translate into their own language, and forthwith it is something entirely different.”