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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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Guillermo Phillips

Posts: 37
Registered: 12/8/04
-1 x -1 ?
Posted: Sep 16, 1999 5:14 PM
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Hello All,

Here's something I've always wondered (perhaps in my naivety). Why
should -1 x -1 = 1?
I appreciate that lots of nice things come from this, but what's the
fundamental reason for it?

Guillermo.

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