Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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bobbym
2012-10-21 07:24:01

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.

anonimnystefy
2012-10-21 07:21:39

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...

bobbym
2012-10-21 07:11:27

Anybody ever heard of N Z Q R C?

ShivamS
2012-10-21 07:06:41

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).

anonimnystefy
2012-10-21 06:46:03

I prefer iR.

ShivamS
2012-10-21 05:51:56

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

anonimnystefy
2012-10-21 05:51:42

#### 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.

zetafunc.
2012-10-21 05:49:58

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?

ShivamS
2012-10-21 05:45:04

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

zetafunc.
2012-10-21 05:39:47

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.

ShivamS
2012-10-21 05:34:26

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".