It is a well known fact that the Lorentz group of transfornations are linear.(adsbygoogle = window.adsbygoogle || []).push({});

Now reading the wiki entry on the LG it spends a good deal explaining its identity component subgroup, the restricted LG group, and it turns out it is isomorphic to the linear fractional transformation group, wich are non-linear transformations, now my doubt

(it might be silly) is how can a subgroup of linear transformations be nonlinear?

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# Lorentz group and the restricted Lorentz group

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