Mathematics desk | ||
---|---|---|
< January 25 | << Dec | January | Feb >> | January 27 > |
Welcome to the Wikipedia Mathematics Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
I know that there is a mathematical formula for this problem (3+1=3) but i cant seem to find it anywhere on the internet. If you would be as kind as to help me, my e-mail address is <email removed>. Thanks 165.29.120.18 20:46, 26 January 2007 (UTC)Kelsey
Sorry to get here so late, but here's a proof for you:
Starting from Peano's axioms: The natural numbers consist of a set N together with a "successor function" f() such that:
We then define "+" by: a+1= f(a). If b is not 1 then b= f(c) for some c and a+b is defined as f(a+c).
Since 2 is DEFINED as f(1), it follows that 2= f(1)= 1+ 1.
In 2+ 2 = 4. We DEFINE 3 as f(2) and 4 as f(3). 2=f(1) so 2+2= f(2+1). But 2+1= f(2)= 3 so 2+2= f(3)= 4! [Mαc Δαvιs] X (How's my driving?) ❖ 17:58, 31 January 2007 (UTC)
Dear Expert, For the purpose of publication, I have used regression analyses and amongst different factors, one of the factors had Odds ratio of 1.02 and p-value of 0.02 and Confidence interval was 1.02-1.15 (small but significant effect?). The reviewer has asked me to explain "What is the purpose of Confidence Interval for that factor?" He has not asked the same question about other factors. Could you please help me to understand what is important about this CI? many thanks —The preceding unsigned comment was added by Arafzal (talk • contribs) 21:23, 26 January 2007 (UTC).