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internal symmetry
subjectfact 
internal symmetryhas definition The properties of different elementary particles can be related to each other by mathematical transformations that look very much like the more familiar symmetry properties of our own physical space. Physicists have therefore hypothesized an abstract internal space in which these internal symmetries are defined. With the help of these internal symmetries, the elementary particles can be gathered into families. The relationship between space-time and these internal symmetries remains to be fully explained.has source: Peat, D. 1988 Superstrings and the Search for a Theory of Everything, Contemporary Books, 2001-09-27 09:32:34.0
is a kind of symmetry2001-09-27 09:32:34.0
symmetryhas antonym symmetry breaking2001-09-27 09:32:34.0