What is meant by " if an electron has size it would be difficult to be make covariant" in quantum field theory.Does this mean the electron would(adsbygoogle = window.adsbygoogle || []).push({});

behave differently in different frames of reference,or does it just mean that the electron would not be in a state that allows it to fit into the mathematical

framework of QFT which I assume involves tensor analysis.And could an

electron ,that has size, be broken down into a series of points and each point be made "covariant" , and then all the covariant results be added

together to represent the electron overall?

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# Making electrons covariant

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