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#1 2011-06-03 09:07:54
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Complex numbers!!!
I didn't see much topics on this subject.
If you know anything interesting about complex or you have a problem with them just post here.
For those who don't know complex numbers are those of the form a+b*i where i is the imaginary unit which is the number for which i^2=-1.
Here are the rules of basic operations with compex numbers:
1)addition:
2)subtraction:
3)multiplication:
4)division:
Last edited by anonimnystefy (2011-06-03 09:22:42)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#2 2011-06-05 03:42:53
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
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Re: Complex numbers!!!
Last edited by anonimnystefy (2011-06-05 03:44:12)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#3 2011-06-19 02:35:36
- soroban
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- Registered: 2007-03-09
- Posts: 452
Re: Complex numbers!!!
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#4 2011-06-20 03:39:04
- 123ronnie321
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- Registered: 2010-09-28
- Posts: 128
Re: Complex numbers!!!
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. .
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Complex numbers remind me of elves and dwarves.
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#5 2011-06-20 04:45:31
- gAr
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- Registered: 2011-01-09
- Posts: 3,482
Re: Complex numbers!!!
Hi,
A simple application is to derive multiple-angle formulas:
E,g.
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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#6 2011-06-21 05:00:22
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Complex numbers!!!
hi
there are also the n-th roots of unity.The n-th root of unity are those numbers (real or complex) that on the power n gives number 1. For example:
Last edited by anonimnystefy (2011-06-21 05:01:49)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#7 2011-06-21 05:14:03
- gAr
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- Registered: 2011-01-09
- Posts: 3,482
Re: Complex numbers!!!
Hi anonimnystefy,
Have you read about de Moivre's formula:
http://en.wikipedia.org/wiki/Root_of_unity#Examples
"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense" - Buddha?
"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."
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#8 2011-06-21 05:40:32
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: Complex numbers!!!
hi gAr
I read something but not all.
Just noticed that they wrote sqrt(-1) which is incorrect.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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