I wrote: Assume with Hotson that there is a negative energy sea with negative energy > charges. I wonder whether, contrary to Hotson's wishes, a positive mass > would nevertheless fall out of general relativity for such negative energy > charges. Even weirder would be a negative mass. The weirdest of all, > though, would be *no* mass. >
If E = mc^2 is to remain an invariant, it would seem that Hotson must either agree to negative mass: (-E) = (-m)c^2, or have another trick up his sleeve. Eric

