BenG549
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Did anyone still arguing with me actually read my original post?
BenG549 said:I never said that negative numbers are useless because they're not real.
BenG549 said:Did anyone still arguing with me actually read my original post?
BenG549 said:Negative number don't actually exist per se, you can't actually have negative something, it is a physically impossible quantity, you can't physically have negative 1 banana.
LastOneStanding said:Sigh. No, but you're still saying they're not "real" (as in, don't really exist), while arguing that natural numbers are because they correspond to quantity.
LastOneStanding said:If you genuinely don't see that what everything that has been said to you by various people is a direct response to this claim, then I doubt repeating it yet again is going to do it.
chiro said:Remember that the numbers themselves are just labels in some descriptive capacity and that descriptive capacity has advantages, disadvantages and limits to not only what it can describe, but more importantly how. Many people forget that integer bases are not the only ones that are used for counting and for representation of numeric quantities.
That doesn't really mean much. You can't "observe" all of the digits in the decimal expansion of 1/3 either. But you can use "1/3" just as easily as "\sqrt{2}" or "e".BenG549 said:Yeah OK 'real' was a VERY bad choice of word on my part (especially given we are discussing mathematics), I guess I didn't mean real because that might suggest that I feel other mathematical ideas are fictional or that negative numbers do not exist on a number line and so on. I'm not saying irrational numbers etc don't exist... I've used them, I know they exist, but in the case of irrational numbers they are uncountable (Cantor's diagonal argument?.. someone with a maths degree might be able to qualify that) you can't observe an infinite series of digits or sets that is what I meant by not real (I accept that it was a bad word to use but in the context of my opening post I didn't think it was going to lead to this lol).
Yeah, you're probably right. Thanks for trying anyway. Didn't mean to annoy anyone too much. I guess I should just concede that I'm either being wildly miss understood or too stupid to understand why I'm wrong, either way I should probably give up.
HallsofIvy said:That doesn't really mean much. You can't "observe" all of the digits in the decimal expansion of 1/3 either. But you can use "1/3" just as easily as "\sqrt{2}" or "e".
BenG549 said:Is EXACTLY my point!
Whovian said:I can show you a tank with π cubic metres of water.
I can also find an electron and show it to you, and it has a charge of -1. Charge is just as real as, say, mass or volume.
Anyway, I've also gotten the feeling that some numbers aren't, in a sense, "natural" (in the sense that mathematics doesn't "think" in them,) but mine was the opposite of yours, trying to work with just integers seemed really ugly and unnecessarily discrete to me. And so I tend not to work with number theory.
BenG549 said:As part of a process of reflection, I've read over this discussion again, and to be honest I don't really blame people for assuming me to be a bit of a crazy person, I definitely said a few things that could have easily been, and evidently were, taken the wrong way. Obviously I'm not going to argue that charge doesn't exist etc. things have definitely been blown a little out of proportion in this thread. I have no real problem with anything you guys are saying and I definitely regret even mentioning negative numbers lol.
Whovian said::) It's fine! I sort of get your point in that irrationals and such aren't "natural" (though I get the opposite feeling,) in which case you might want to go into number theory or combinatorics if you go into math.
1 / 10 is a rational number...Michael Redei said:Does 1/10 count as an irrational number?
BenG549 said:OK fine... Show me -$10.
jtbell said:My credit card balance right now is -$125.66. It doesn't show up with a minus sign on the credit card company's web site, but when I pay it off it will reduce my checking account balance.