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"Symmetry groups are undeniably basic but why must spacetime have a group structure? The answer to this question is delightfully simple. The PoincarĂ© group follows from the homogeneity of time. If you're interested in a revolutionary new approach to special relativity, inspect my proof carefully. I derive special relativity without postulating the existence of any group structure. My axioms are intuitive: Time is to be defined with motion and all time computations can be performed with homogeneous functions."

"See the updated http://www.everythingimportant.org/relativity/special.pdf "

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# A Derivation of Special Relativity without Invoking Group Theory

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