General This forum is for nontechnical general discussion which can include both Linux and nonLinux topics. Have fun! 
Notices 
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
Are you new to LinuxQuestions.org? Visit the following links:
Site Howto 
Site FAQ 
Sitemap 
Register Now
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQrelated cookies.

Introduction to Linux  A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free. 



09222006, 10:28 AM

#1

Member
Registered: Apr 2006
Distribution: ubuntu 7.04
Posts: 219
Rep:

Does the square root of 1 exist? Poll!
(not a serious thread!)
Does the square root of 1 exist?
No. The square root of 1 is a mathematical convenience and a figment of man's imagination
No. Seeing as numbers do not actually exist in the real world, neither do imaginary numbers (Mwa ha!) >The Biologist's answer?!
No. They only exist if you believe in them! (The agnostic's answer?!)
Yes. I saw it in a bar on Fourth Street last Tuesday drinking daquiris with Bigfoot.
Yes. Because I say so.
Yes. And I have this big fancy list of equations to prove it. How *clever* am I?
Yes. Seeing as the universe is infinitely big, then imaginary numbers *have* to be out there somewhere!
Yes, we have no bananas.



09222006, 10:29 AM

#2

Senior Member
Registered: Dec 2003
Posts: 3,142
Rep:

Where's the poll? Is it imaginary as well?



09222006, 10:31 AM

#3

Member
Registered: Apr 2006
Distribution: ubuntu 7.04
Posts: 219
Original Poster
Rep:

Hold your horses... there it is now



09222006, 10:33 AM

#4

Senior Member
Registered: Dec 2003
Posts: 3,142
Rep:

Now that's the spirit



09222006, 01:06 PM

#5

Member
Registered: Jun 2005
Location: Indiana, USA
Distribution: OpenBSD, Ubuntu
Posts: 892
Rep:

The trick (from what I understand) is that we've got this framework of axioms from which everything else derives. When it works, that's good and we can build other things on top of it. When we find something that doesn't work with what we have, we put something else into our set of axioms so we can do what we need.
The reason we can do this is because math doesn't physically exist. We can't reach out and touch addition or three. Instead, math represents the real world. We can visuallize adding one set of apples to another, and we can see three oranges. So if we come across something that as yet can't be rationalized mathematically, we put that functionality into our mathematical framework.
Take zero for example. Humanity had no notion of zero for a long time; I believe the Babylonians and Mezoamerican cultures were the first to come up with it. Before that, we simply didn't need to represent a lack in that kind of nomenclature. It was more like, "Oh, no. I don't have any food. I'd better get some." But once cultures started developing the need to express that lack in mathematic terms, it was invented.
And like imaginary numbers, zero is something you can't really visualize. I mean, how do you hold zero of something? You're not really holding anything at all! The same goes for 3i+8 and lots of other things in mathematics.
So, yeah, I think imaginary numbers are "real" (pun intended) just like any other mathematical form is real. Not necessarily relevant to a lot of people, but a necessary part of the mathematical framework.



09222006, 08:53 PM

#6

Member
Registered: Mar 2005
Location: Utah, USA
Distribution: Slackware 11
Posts: 816
Rep:

I saw root 1 last week. It looked a bit thin and weak to me.
Edited because I'm too tired to be allowed online right now.
Last edited by Charred; 09222006 at 08:55 PM.



09222006, 10:58 PM

#7

Member
Registered: Mar 2005
Location: Winnipeg, MB
Distribution: Raspbian, Debian, Slackware, OS X
Posts: 443
Rep:

Mathematical convenience.
However, the square root of bannana is fairly tasty with ice cream and chocolate sauce.
Pi à la mode is nice too



09232006, 01:48 AM

#8

Member
Registered: Jun 2005
Posts: 542
Rep:

"No. They only exist if you believe in them!" is basically the same as "No. The square root of 1 is a mathematical convenience and a figment of man's imagination"



09232006, 03:50 AM

#9

Senior Member
Registered: Nov 2003
Location: Perth, Western Australia
Distribution: Ubuntu, Debian, Various using VMWare
Posts: 2,088
Rep:

Complex numbers are very useful in Engineering  AC current and voltage can be convieniently expressed in complex form. Impedance is a complex quantity. Complex numbers explain why a balanced 3phase load doesn't need a dedicated neutral line.
From my dim distant memories of advanced maths, complex numbers are also used to derive trig identities.
When people discovered 0, it was quite a scary principle. Zero is both nothing, and something. Zero added to the end of a number increases that number by an order of magnitude.
Ian
Last edited by IBall; 09232006 at 03:52 AM.



09232006, 04:02 AM

#10

Senior Member
Registered: Dec 2003
Posts: 3,142
Rep:

Complex numbers are extremely useful and practical in engineering, true. When I was studying EEE, a lot of problems involving alternating current/voltage used complex numbers.
So to say they don't exist is like saying electricity doesn't exist because you can't see it.



09232006, 07:22 AM

#11

Member
Registered: Apr 2006
Distribution: ubuntu 7.04
Posts: 219
Original Poster
Rep:

Quote:
No. They only exist if you believe in them!" is basically the same as "No. The square root of 1 is a mathematical convenience and a figment of man's imagination"

Hmmm... one is a joke, and the other is not
Quote:
So to say they don't exist is like saying electricity doesn't exist because you can't see it.

Don't you wag your finger at me!
(I'm well aware of the applications in engineering / quantum physics, etc. ...)
That's not really true though, because as somebody above aptly put it:
Quote:
The reason we can do this is because math doesn't physically exist. We can't reach out and touch addition or three. Instead, math represents the real world

Mathematics merely describes our world, it doesn't technically exist in and of itself, unlike electricity, which having had numerous electrtic shocks before, I *can* authoratively tell you does exist!
Would numbers really exist by now if our universe was exactly the same as it is, but humanity didn't exist?
... This is what I was driving at with the answer No. "Seeing as numbers do not actually exist in the real world, neither do imaginary numbers (Mwa ha!)"
...as numbers don't really exist in nature. I'm surprised noone has voted for this one (yet?).
I'd have voted for it myself but I just had to go for "Yes, we have no bananas".
Must have been all those electric shocks I've had.
Mmmmm, bananas. Banana cake. I like banana cake.
Last edited by 144419855310001; 09232006 at 07:27 AM.



09232006, 07:49 AM

#12

Senior Member
Registered: Dec 2003
Posts: 3,142
Rep:

I wag my finger at you because I'm a wag



09232006, 08:24 AM

#13

Member
Registered: Mar 2006
Location: Edinburgh
Distribution: Debian Etch, Gentoo
Posts: 90
Rep:

Quote:
Would numbers really exist by now if our universe was exactly the same as it is, but humanity didn't exist?

Would 3 things be called 3 things? No, but there would still be 3 of them, it just wouldn't be quanitifed and named. Everything would still tick over obeying the laws of physics etc, just there would be noone to write these laws down in ways that make sense to humans.
So my argument is that YES, numbers (real and imaginary) would still exist just no one would have discovered them yet



09232006, 11:49 AM

#14

Senior Member
Registered: Jul 2005
Distribution: Slackware
Posts: 2,014
Rep:

Depends on what you mean by "exist". If you mean "has real world applications", then sqrt(1) certainly exists. If you mean "can be represented", the sqrt(1) exists that way too. If you mean "can be detected directly or indirectly through the five senses", then sqrt(1) and every other mathematical idea doesn't exist. That's a good excuse for not doing your math homework  "But professor, math doesn't exist!".



09232006, 07:42 PM

#15

Member
Registered: Aug 2004
Location: Albany, Western Australia
Distribution: Mageia 4.1, SME Server 8
Posts: 627
Rep:

I voted
"No Bananas"
at over $ 12 a kilo
there are way too expensive
due to a hurricane wiping out most of Australia's crop
last season
floppy



Thread Tools 
Search this Thread 


Posting Rules

You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off



All times are GMT 5. The time now is 09:24 AM.

LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.

Latest Threads
LQ News

