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, 11:58, 7 May 2009→Commentary Note 12.5
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+The products commute, so the equation holds. In essence, the matrix identity turns on the fact that the law of exponents <math>(a^b)^c = a^{bc}\!</math> in ordinary arithmetic holds when the values <math>a, b, c\!</math> are restricted to <math>\mathbb{B}.</math>
==References==
==References==
