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Is it true that ABC = CBA implies [A,B]=[A,C]=[B,C]=0 ??
The converse is of course true, and I cannot find a counter-exemple (ex: no 2 of the above commutation relation above are sufficient), but how is this proven??
The converse is of course true, and I cannot find a counter-exemple (ex: no 2 of the above commutation relation above are sufficient), but how is this proven??
