- #1

Spinnor

Gold Member

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## Main Question or Discussion Point

I'm guessing string theory might get a lot simpler if there were only electrons, positrons, photons, and gravitons around?

Mathematically could there be a Universe with only electrons, positrons, and photons? If so, how many dimensions would such a string theory need?

Mathematically could there be a Universe with only electrons, positrons, and photons? If so, how many dimensions would such a string theory need?