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CTK Exchange
alexb
Charter Member
1392 posts |
Dec-07-04, 03:13 PM (EST) |
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1. "RE: Integers"
In response to message #0
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>The page
>https://www.cut-the-knot.org/do_you_know/fundamental2.shtml
>says something to the effect that "the integers are not
>closed under subtraction." What you mean is "the naturals
>are not closed under subtraction." Thought I might point
>this out to eliminate confusion. Thank you. Long, long ago I thought it could be possible to improve the common terminology: to use "integers" for 1, 2, 3, ... and "whole numbers" for -2, -1, 0, 1, 2, ... This page is a remnant of this intention. I hope now everything is OK. |
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Pilar
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Dec-07-04, 10:06 PM (EST) |
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2. "Sorry"
In response to message #1
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Sorry, this has nothing to do with this conversation, but as the other is blocked, I have no choice (I guess I could just shut up, but I don't want to)but to post it here.
First of all, yes, I made a mistake, 1/3 is indeed rational, the others are not, my excuses.
Second, of course 1/3 does not equal 0.333 or so.
Then, I agree with alex in the fact that language is important, I have said so many times before here.
And finally, I would like to add that decimals are not accurate at all.
Let's calculate the square root of 2, or the e number, or our beloved friend Pi, and put them in decimals.
Besides, if one can use a fraction or the number itself, I do not understand the very existance of decimals.
And my dear bob, of course I don't expect you to carry your computer anywhere, but there's always a way to wait and do it later or something, anything is better than 3.14159.
And the theory of how thw numbers jus stop or so, well, that's either beyond my capacity of reasoning, or plainly stupid.
Once more, alex, I am sorry for this, but I just had to say it.
See you.
Pilar.
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