Have you included anti-matter?
It's a pity that you haven't asked for the strangest mathematical thing. That would definitely be "The Axiom" as I like to call the axiom of choice.
Yes, anti-matter is quite important to my story. I will have a creature made of anti-matter, plus a entire universe.Have you included anti-matter?
Exotic matter having negative mass and negative density,
The more of it there is, the less effect it has on anything else.