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Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.
a stub, in order to make links work (this needed now at symmetry protected topological phase etc., but it has also long been requested at Coleman-Mandula theorem)
added one reference that makes the definition of internal symmetry in CMT fully explicit
(will try to find a more canonical reference for this).
Also added a warning that the historical terminology at some point was the opposite to what it is today:
Beware that old historical articles (eg. Barlow 1883) used “internal symmetry” to refer to crystallographic symmetry which now is referred to as “spatial symmetry” and regarded as non-internal.
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