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#1 2012-10-20 06:34:26

ShivamS
Member
Registered: 2011-02-07
Posts: 3,438

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".

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#2 2012-10-20 06:39:47

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 2012-10-20 06:45:04

ShivamS
Member
Registered: 2011-02-07
Posts: 3,438

Re: Zahlen

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

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#4 2012-10-20 06:49:58

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 2012-10-20 06:51:42

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,859

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.


“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

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#6 2012-10-20 06:51:56

ShivamS
Member
Registered: 2011-02-07
Posts: 3,438

Re: Zahlen

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

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#7 2012-10-20 07:46:03

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,859

Re: Zahlen

I prefer iR.


“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

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#8 2012-10-20 08:06:41

ShivamS
Member
Registered: 2011-02-07
Posts: 3,438

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).

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#9 2012-10-20 08:11:27

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,564

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.

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#10 2012-10-20 08:21:39

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 14,859

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...


“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

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#11 2012-10-20 08:24:01

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 82,564

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.

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