Recent content by epmc2

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    Einstein's Hypotenuse: Unraveling the Mystery of Minus Signs

    i was watching a lecture and the professor started explaining how einstein's hypotenuse was used in explaining dimensions. but failed to explain how einstein arrived at: H2=c2*t2-d12-d22-d32 i was wondering where the minus signs came from?
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    Do superstrings exist in two states of spin?

    thats what i thought thanks. but ya... what about open strings if they exist?
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    Do superstrings exist in two states of spin?

    As you could probably tell, my question is whether or not a superstring could exist with two different types of spin, if they have a spin at all?
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