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group_theory:notions:casimir_operators [2017/12/06 09:33] (current)
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|+||====== Casimir Operators ======|
|+||The Casimir operators are those operators that can be built from the generators of a given group that commute with all generators of the group. Therefore their value is invariant and can be used to characterize the irreducible representations.|
|+||This means in practice that the Casimir operators simply yield a fixed (=invariant) number for each representation that we use to label representations. |