# The mass-centre in the restricted theory of relativity and its connexion with the quantum theory of elementary particles

@article{Pryce1948TheMI, title={The mass-centre in the restricted theory of relativity and its connexion with the quantum theory of elementary particles}, author={Maurice Henry Lecorney Pryce}, journal={Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences}, year={1948}, volume={195}, pages={62 - 81} }

The Newtonian definition of the mass-centre can be generalized to the restricted theory of relativity in several ways. Three in particular lead to fairly simple expressions in terms of instantaneous variables for quite general systems. Of these only one is independent of the frame in which it is defined. It suffers from the disadvantage that its components do not commute (in classical mechanics, do not have zero Poisson brackets), and are therefore unsuitable as generalized co-ordinates in… Expand

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