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 Post subject: basic demonstrationPosted: Sun, 5 Feb 2006 21:10:44 UTC
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Joined: Mon, 27 Dec 2004 01:49:59 UTC
Posts: 4
hi, I need to prove that in any base b, the result of multiplying two numbers of k digits doesn't need more than 2 * k digits.

thanks a lot!![/i]

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 Post subject: Posted: Tue, 7 Feb 2006 02:44:17 UTC
Hi!

What do you mean with any base b?

I think could come in handy for this problem.

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 Post subject: Posted: Fri, 10 Feb 2006 22:43:29 UTC
 Member of the 'S.O.S. Math' Hall of Fame

Joined: Sun, 4 May 2003 16:04:19 UTC
Posts: 2906
u*v<=(b^k-1)^2<b^(2k)
done

_________________
Has anyone noticed that the below is WRONG? Otherwise this statement would be true:

where

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