Originally posted by CP5670
Whoops, you're right; my equation is somewhat incorrect, but yours is even worse. 
I'm not sure about that.

Actually, you're probably right.
I believe antimatter yields a negative energy value, but the mass is still positive, thereby giving two energy values (one matter and one antimatter) for each mass value, so the equation would be my original |e|=mc² one.
Maybe. I wrote that in complete ignorance of the physics; I just assumed the mass was negative and that there's no such thing as anti-energy.
However, that is not quite right either, as it does not take negative and complex values of m into account - they may not mean anything in the physical world, but as a theory-oriented guy these values are just as important to me as the realistic ones.
Assuming that Blitz's original equation is correct, the absolute values would need to be on both sides to take both negative and complex values into account; something like |e|=|m|c². (c would be predefined so we don't need to worry about that)
That would be the most accurate equation assuming that the mass can be negative or positive and the energy can be negative or positive, and whether the energy is negative or positive or the matter is negative or positive does not depend on the sign of the other (whew!).
The problem I would have is that logically if you added two energy values,
x+y=e
to get your energy value, these two groups of equations,
|e|=|m|c²
|x|=|m|c²
|y|=|m|c²
would yield different values for e. |e|=|m|c² could yield two different values, while the second group could yield anything between -e and e.
It's quite possible energy isn't used that way, though.
We ought to team up on this; you seem to understand the physics, and I seem to understand the math, so I'm sure we could figure it out together.
