- #1

jdinatale

- 155

- 0

**Proving the "triangle inequality" property of the distance between sets**

Here's the problem and how far I've gotten on it:

If you are unfamiliar with that notation, S(A, B) = (A \ B) U (B \ A), which is the symmetric difference.

And D(A, B) = m^*(S(A, B)), which is the outer measure of the symmetric difference.