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## #1 2012-10-21 05:34:26

ShivamS
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### Zahlen

I was originally born in India, where I learned something different  then here in Canada. Here, I hear (word pun!) that the symbol for Integers is I, however I recall being taught that Integer was represented by Z (as in the German word Zahlen) meaning "to count upwards".

I have discovered a truly marvellous signature, which this margin is too narrow to contain. -Fermat
Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. -Archimedes
Young man, in mathematics you don't understand things. You just get used to them. - Neumann

## #2 2012-10-21 05:39:47

zetafunc.
Guest

### Re: Zahlen

Yes, the boldface 'Z' is German for 'zahl', which I think is German for 'integer'. I've only ever seen "I" used to represent the set of all imaginary numbers, and to denote the identity mapping.

## #3 2012-10-21 05:45:04

ShivamS
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### Re: Zahlen

I believe imag numbers are represented with a C-, is it not? In the education system here, they showcase Integer as I.

I have discovered a truly marvellous signature, which this margin is too narrow to contain. -Fermat
Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. -Archimedes
Young man, in mathematics you don't understand things. You just get used to them. - Neumann

## #4 2012-10-21 05:49:58

zetafunc.
Guest

### Re: Zahlen

C-? Hmm, I have never seen that before. I've only seen C for the complex numbers. Does C+ have any meaning in your system, just out of interest?

## #5 2012-10-21 05:51:42

anonimnystefy
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### Re: Zahlen

#### Shivamcoder3013 wrote:

I believe imag numbers are represented with a C-, is it not? In the education system here, they showcase Integer as I.

C are complex numbers.

I are irrationals.

I can also represent the identity matrix.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #6 2012-10-21 05:51:56

ShivamS
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### Re: Zahlen

By C-, I meant C with a dash on top:   -
C

I have discovered a truly marvellous signature, which this margin is too narrow to contain. -Fermat
Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. -Archimedes
Young man, in mathematics you don't understand things. You just get used to them. - Neumann

## #7 2012-10-21 06:46:03

anonimnystefy
Real Member

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### Re: Zahlen

I prefer iR.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #8 2012-10-21 07:06:41

ShivamS
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### Re: Zahlen

Ah. So there is no actual specified system for the representation of such number systems. They should call it SINS, as in System Internationale Number Systems (not implying that it is morally degenerate however).

I have discovered a truly marvellous signature, which this margin is too narrow to contain. -Fermat
Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. -Archimedes
Young man, in mathematics you don't understand things. You just get used to them. - Neumann

## #9 2012-10-21 07:11:27

bobbym

Online

### Re: Zahlen

Anybody ever heard of N Z Q R C?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #10 2012-10-21 07:21:39

anonimnystefy
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### Re: Zahlen

Of course. But those are all just conventional. You could call the naturals F, although nobody would know you are referring to them, unless you specify your notation...

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #11 2012-10-21 07:24:01

bobbym

Online

### Re: Zahlen

That is my pet peeve. I almost always go berserk when I am reading something and the guy defines something in a non standard way.
Had a combinatorics and summation book like that. Insisted on using different symbols. Ripped em both up and burned em.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.