Reading into some special relativity, I have seen E=mc^2 proposed from the assumption of four momentum conservation and the fact that the 'mass' component varies with velocity with the gamma factor, like a kinetic energy.(adsbygoogle = window.adsbygoogle || []).push({});

This seems a bit of a leap of faith to me so I was wondering if there are more rigorous derivations preferably only assuming special relativity?

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# Derivation of E=mc^2

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