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Math Forum » Discussions » sci.math.* » sci.math.independent

Topic: -1 x -1 ?
Replies: 29   Last Post: May 13, 2009 9:01 AM

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Chuck Cadman

Posts: 16
Registered: 12/12/04
Re: -1 x -1 ?
Posted: Sep 17, 1999 10:08 PM
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Dale Henderson wrote in message <7rudbk$u6l$1@nnrp1.deja.com>...
>
>I've seen a few proofs on this thread that make unfounded assumtions.
>One assumes the uniqness of inverses and another assumes 0x=0.
>Ironically the result (-a)b=-ab is requred to prove 0x=0.

That's not really true. 0 = 0x - 0x = (0+0)x - 0x = 0x + 0x - 0x = 0x.

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