What do you get when you cross a mountaineer and a mosquito?
Nothing, you can't cross a scalar and a vector!
This one is top notch. I have an unlimited supply of lame math jokes, only some of which i get. Enjoy. They will either be very funny, very confusing, or a great learning experience.
Q: Why can't you grow wheat in Z/6Z?
A: It's not a field.
Q: Why do truncated Maclaurin series fit the origi-
nal function so well?
A: Because they are "Taylor" made.
Q: What's purple, commutes, and is worshipped by
a limited number of people?
A: A finitely-venerated abelian grape.
or my personal favorite
Q: How many Bourbakists does it take to replace a
lightbulb?
A: Changing a lightbulb is a special case of a more
general theorem concerning the maintenance and
repair of an electrical system. To establish upper and
lower bounds for the number of personnel required,
we must determine whether the sufficient conditions
of Lemma 2.1 (Availability of personnel) and those
of Corollary 2.3.55 (Motivation of personnel) apply.
If and only if these conditions are met, we derive the
result by an application of the theorems in Section
3.1123. The resulting upper bound is, of course, a
result in an abstract measure space, in the
weak-* topology.