Thread: Concept of Quantity

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  1. 03-07-2011 #1
    Sang-drax
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    Quote Originally Posted by Mario F. View Post
    It instantly stroke a chord with our debate here. "0.999... = 1" is an unprovable axiom in my view. It can however be demonstrated as being consistent within R.
    Your view is correct. 0.999... is by definition (or: unprovable axiom) equal to lim(n->oo)sum(k=1...N) 9/10^(-k).

    I'd be interested in such a demonstration, however. What did you have in mind?
    Last edited by Sang-drax; 03-07-2011 at 05:52 PM.
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