# All innovators - HELP!

1. Sep 5, 2005

### Dr.Brain

All innovators --- HELP!

I have to think of some drawing/painting resembling the TOPIC "NIX PERIPHERA" which means "No Boundaries"

"NIX PERIPHERA" is the theme for our annual cultural fest in my tech-skool , and I have to think of some innovatory ideas regarding the paintings that we can make resembling the topic , also please tell ideas about structures that we can make which resemble the given topic in a way (like a 6" tall structure of Bird with open wings---> resembling no boundaries....blah blah) ...

ANything scientific/cool/wierd , anything that you can think of ...anythinggg..

BJ

2. Sep 5, 2005

### zoobyshoe

An extreme closeup of Charles Manson's face would vividly illustrate the concept of "No Boundaries," I think.

3. Sep 5, 2005

### Townsend

That's brilliant, I never would have thought of that.

4. Sep 5, 2005

### Townsend

How about something to do with the tower of babel?

5. Sep 5, 2005

### Math Is Hard

Staff Emeritus
$$(-\infty,\infty)$$

6. Sep 5, 2005

### mattmns

pfff!!!!!!!!!!!

This is more like it $$[-\infty, \infty ]$$

7. Sep 5, 2005

### Knavish

But that makes no sense. :tongue: Besides, it adds a boundary, which isn't what we want.

8. Sep 5, 2005

### mattmns

True, they both have boundaries, but at least mine includes infinity :tongue2:

Last edited: Sep 5, 2005
9. Sep 5, 2005

### Townsend

Really? So what then is $$[-\infty, \infty ] - (-\infty,\infty)$$ = ?

10. Sep 5, 2005

### mattmns

I am not sure about the definition of infinity, but I would guess that the subtraction would be $$\{-\infty, \infty\}$$

11. Sep 5, 2005

### Townsend

We are talking about two distinct sets... one set is a subset of the other set. If you take away all the elements of the subset what are we left with?

In other words.....using brackets for your set does not seem to make any sense. At least not up to any of the math classes I have taken.

12. Sep 5, 2005

### mattmns

I am no math expert, but this is what I was thinking, I may have misunderstood you.

If we have a set that contains all the elements up to infinity and down to negative infinity, we have $$\{ x | -\infty < x < \infty \}$$ which is denoted by $$( -\infty, \infty )$$

If we then look at the set including infinty and negative infinity we have $$\{ x | -\infty \leq x \leq \infty \}$$ which is denoted by $$[ -\infty, \infty ]$$

If we then subtract the latter set by the former (what I am guessing you meant by the - sign, set difference of the two sets), we will get a set with 2 elements: $$-\infty, \infty$$
Which I wrote as the set: $$\{ -\infty, \infty \}$$

Keep in mind I am no math expert, so I could easily be wrong.

Last edited: Sep 5, 2005
13. Sep 5, 2005

### Townsend

Well that's just it....infinity is not an element of the set but a symbol that means it just goes on and on....

For example $$(- \infty,\infty)$$ could be written as the real number line. Where on that number line is infinity? It is nowhere on the line that I can think of....

So how could it be included in the set? Which makes writing infinity with the closed bracket kind of non-sense.

Do you see what I mean?

14. Sep 5, 2005

### mattmns

Ohh, you did not like my use of square brackets. Pff, math standards I was using it more of as a joke

15. Sep 5, 2005

### Townsend

I don't know if they're standards so much...more like conventions so people understand what is meant by symbols......

16. Sep 5, 2005

### Dr.Brain

ok I want more ideas.

17. Sep 5, 2005

### Townsend

Try concentrating harder then....

18. Sep 5, 2005

### JamesU

how about just plain $$\infty$$?

or $$\overline{\infty}$$