# How to randomize sets in math equations ?

1. Jun 19, 2012

### littlestudent

for example i have this :
F={1,2,3,4,5}
so F=1,2,3,4,5
but how to randomize the set ?
i want to say F=5,3,4,2,1 or 2,3,1,4,5 or ...

do i have to say like this? :
F=(1)/(2)/(3)/(4)/(5)

2. Jun 19, 2012

### micromass

Some more information could be helpful. Why do you want to "randomize" things?? What is it you're trying to do?

3. Jun 19, 2012

### littlestudent

i want to explain 2 Dice=F
the F is random of this set : {1,2,3,4,5,6}
what is the right way to say it ?
is this right ?
F={(1.2.3.4.5.6)} ???

4. Jun 19, 2012

### Number Nine

Then all you're saying is that the roll of a die is a random variable that can take on values from 1 to 6.

5. Jun 20, 2012

### littlestudent

so F={(1.2.3.4.5.6)} is the right format to say that ?
the "." do the random explanation ?

6. Jun 20, 2012

### haruspex

A set, like {1, 2, 3, 4, 5, 6}, has no specific order. Neither does it imply anything about relative probabilities. A probability space is more than just the set of possibilities. If you mean them to be equally likely you should say so.
Btw 'random' does not mean equally likely. It just means not deterministic.

7. Jun 20, 2012

### littlestudent

ok so F={1,2,3,4,5,6} is same as F={(1.2.3.4.5.6)} ?

update: let me correct myself. so if F={1,2,3} then F can equal (123) or (132) or (213) or ... right ?

Last edited: Jun 20, 2012
8. Jun 20, 2012

### micromass

No, it's not the same. Furthermore, I have not a single idea what you mean with that second notation.

What are you trying to do??

9. Jun 20, 2012

### haruspex

Along with micromass, I have no idea what {(1.2.3.4.5.6)} means. I've never seen such a notation. And I don't know what you mean by F = (123) etc. F is a set, pure and simple, specifically, the set of possible outcomes from one trial.

10. Jun 20, 2012

### Number Nine

No. You don't seem to understand the notion of a set.
F = {1, 2, 3} means that F, as a set, contains the elements 1, 2 and 3. There is no order implied. None. Sets have no notion of order, and the idea of "randomizing a set" makes no sense at all, nor does the notation "F = {(1.2.3)}".