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[Phys-L] Re: arithmetic
From
: "RAUBER, JOEL" <
Joel.Rauber@SDSTATE.EDU
>
Date
: Wed, 23 Feb 2005 17:07:31 -0600
|
| The proof that (S0 + 0) is equal to (0 + S0) is easy.
|
Am I allowed to use associativity for "+",
i.e. may I use (a+b)+c = a+(b+c) for any, (a,b,c)
And may I use
a+c=b+c => a=b ?
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