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Is the following property exclusive to the identity elements: a

^{-}= a (inverse of a = a)?- Thread starter Gear300
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Is the following property exclusive to the identity elements: a^{-} = a (inverse of a = a)?

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Office_Shredder

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Nope. For example in Z_{2}, the integers mod 2, you have two elements 0 and 1, and 1+1=0, so 1=-1

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I see. Thanks for the reply.

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