The following was sent to me by my friend Pat Flynn, and it may enter my email signature soon.
The derivative of my enthusiasm for mathematics is positive for all values of the independent variable.
And here are some one-liners that don’t warrant their own posts, but they’re just too good not to share…
Heisenberg might have slept here.
Old mathematicians never die; they just lose some of their functions.
Whenever four mathematicians get together, you’ll likely find a fifth.
“Take a positive integer n. No, wait, n is too large; take a positive integer k.”