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☖ Forums → Discussion Forum → Imaginary numbers.
Imaginary numbers.
2006-12-13, 7:12 PM #1
That was the lesson today for math. Just curious, is there an alt code that can make the special "i" for the imaginary number.

It's you get the square root of a negative number such as -1. Radical negative one is an imaginary number.

Thank you.
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2006-12-13, 7:24 PM #2
í ðôñ†, §ö®®ÿ.
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2006-12-13, 7:25 PM #3
You might use the lowercase iota symbol from the character map. That will just be the symbol though.
If you get the Windows XP Powertoy Calculator then you can use the "a + bi" form in actual calculations.
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2006-12-13, 7:29 PM #4
[url]www.google.com[/url]

It's mainly an italicized 'i' or i. If you use 'i' in math...and who understand math will most likely get that i = sqrt(-1)
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2006-12-13, 7:41 PM #5
Oh, seems like I'm too late. Well, before I posted this post I thought of what JediGandalf always says "www.google.com" so I went there and searched and didn't find it.

At school when people ask me questions you can find on google, I tell them, to google it. Made my life easier because people ask me alot of questions.
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2006-12-13, 7:57 PM #6
i is what I learnt. Except I just write it i in books, because bolding and stuff with pens is crappy.

Except this could be confused with vectors in the i, j, k notation.

Eh.
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2006-12-13, 8:36 PM #7
That is actually EXTREMELY confusing because it's convention to bold vectors in many textbooks, etc.

I just write a normal i. I mean, who the hell uses i as a variable?
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2006-12-13, 8:37 PM #8
[QUOTE=- Tony -]i is what I learnt. Except I just write it i in books, because bolding and stuff with pens is crappy.

Except this could be confused with vectors in the i, j, k notation.

Eh.[/QUOTE]
not really, as vector notation is supposed to have the ^ above the i/j/k.
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2006-12-13, 9:04 PM #9
Originally posted by Pommy:
That is actually EXTREMELY confusing because it's convention to bold vectors in many textbooks, etc.

I just write a normal i. I mean, who the hell uses i as a variable?


Electricians use i as the variable for current. j is used to denote imaginary numbers instead.
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2006-12-13, 10:06 PM #10
Originally posted by Pommy:
I just write a normal i. I mean, who the hell uses i as a variable?
...every programmer known to god...
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2006-12-13, 10:24 PM #11
Originally posted by Bobbert:
Electricians use i as the variable for current. j is used to denote imaginary numbers instead.



Yep. And I'll tell you what it makes the maths 10 times easier to use complex analysis.

God bless Euler and his crazy functions :v:
2006-12-13, 10:26 PM #12
Originally posted by Bobbert:
Electricians use i as the variable for current. j is used to denote imaginary numbers instead.


Usually when I've seen that (in Physics) it's been written as I (uppercase), and J (uppercase) is used for impulse.

Originally posted by Freelancer:
...every programmer known to god...

I meant in math.
一个大西瓜
2006-12-13, 11:06 PM #13
What's the difference?
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2006-12-13, 11:19 PM #14
I use i constantly in programming but I've never used it in algebra? haha
一个大西瓜
2006-12-13, 11:33 PM #15
e^(pi * i) = -1.

That's just silly.
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2006-12-13, 11:56 PM #16
Originally posted by happydud:
e^(pi * i) = -1.

That's just silly.


Euler is awesome.
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2006-12-14, 7:39 AM #17
http://xkcd.com/c179.html

(A bit of language!)
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2006-12-14, 7:46 AM #18
http://www.google.com/search?q=e+to+the+%28pi+times+i%29

I'm not even going to try to understand that and just trust google.
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2006-12-14, 8:04 AM #19
Originally posted by Impi:
http://www.google.com/search?q=e+to+the+%28pi+times+i%29

I'm not even going to try to understand that and just trust google.

Euler's Identity
Code to the left of him, code to the right of him, code in front of him compil'd and thundered. Programm'd at with shot and $SHELL. Boldly he typed and well. Into the jaws of C. Into the mouth of PERL. Debug'd the 0x258.
2006-12-14, 8:56 AM #20
You lost me at "imaginary number" but thanks to google I have a little understanding now.
2006-12-14, 8:58 AM #21
Originally posted by Martyn:

God bless Euler and his crazy functions :v:




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