whodunit?

Discussion in 'Free Thoughts' started by leopold, Jul 9, 2006.

  1. leopold Valued Senior Member

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    17,455
    what is x divided by x?
     
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  3. Absane Rocket Surgeon Valued Senior Member

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    8,989
    I think I gave a counterexample... but I thought of another.

    A point in space. We can obviously comprehend a point.. however it is undefined because it's one of the basic assumptions of mathematics. And some assumptions cannot be proved or defined in the same system.
     
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  5. Absane Rocket Surgeon Valued Senior Member

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    8,989
    one.

    What's (2x)/x?

    Make x really fucking big... infinity/infinity. Does this equale 1?
     
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  7. leopold Valued Senior Member

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    17,455
    no, it equals 2
     
  8. Absane Rocket Surgeon Valued Senior Member

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    8,989
    Exactly... however x/x when x is really big is infinity/infinity.

    Same for (2x)/x. When x is really big (infinitely big).. it's infinity/infinity.

    So how does infinity/infinity = 1?

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  9. Oli Heute der Enteteich... Registered Senior Member

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    Go with that. But it might start another argument

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  10. leopold Valued Senior Member

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    if 2x is infinite then it is no longer 2x but infinity.


    What is infinity divided by infinity? Most people would say it equals one. (infinity)x(infinity)=(infinity), so (infinity)=(infinity)/(infinity). Depending on how you figure it out, you can get infinity divided by infinity to equal just about anything.
    http://www.newton.dep.anl.gov/askasci/math99/math99198.htm

    if the above is true then infinity/infinity equals 1 or 150 billion, take your pick.
     
  11. Absane Rocket Surgeon Valued Senior Member

    Messages:
    8,989
    ...

    Look...

    (2x)/x
    1) 2/1 = 2
    2) 2*2/2 = 2
    3) 2*1000/1000 = 2

    infinity/infinity is undefined because there is not enough information to give it a quanity.

    I would still like to see why infinity/infinity = 1 according to you.
     
  12. Absane Rocket Surgeon Valued Senior Member

    Messages:
    8,989
    This is just like saying 0/0 = 1.

    It makes NO sense.
     
  13. Oli Heute der Enteteich... Registered Senior Member

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    11,888
  14. Absane Rocket Surgeon Valued Senior Member

    Messages:
    8,989
    Not all...

    infinity + infinity = infinity
    infinity*infinity = infinity

    0 + 0 = 0
    0*0 = 0
     
  15. Oli Heute der Enteteich... Registered Senior Member

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    11,888
    Yep. Misread. The only time a + causes problems is when one of the infinities is minus infinity, effectively making it - rather than plus anyway. And of course a + or - with a zero either side is no problem.

    infinity + infinity = infinity
    But does that change the type of infinity? Countable to uncountable, or not?
    infinity*infinity = infinity
    Same with this one.

    0 + 0 = 0
    0*0 = 0
    These don't count, since I said two infinities or an infinity and a zero.

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  16. Absane Rocket Surgeon Valued Senior Member

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    8,989
    Nope. A bad way to say this but: to make an infinity "bigger," you got to put infinity with another infinity an infinite number of times.

    It's a really bad way to say it... but I don't feel like getting technical.

    I misread, too.
     
  17. Oli Heute der Enteteich... Registered Senior Member

    Messages:
    11,888
    Yep. Got you. Although most of my knowledge of infinities in maths comes from Ian Stewart's books and Rudy Rucker's White Light - you ever get a chance to read that (science fiction but using a ton of transfinite maths comcepts as part of the "in joke"), grab it.
    It's late guy. I'm calling it a night (6:40 in the morning). Catch you later.
     
  18. leopold Valued Senior Member

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    17,455
    from the site i gave earlier:
    Depending on how you figure it out, you can get infinity divided by infinity to equal just about anything.
     
  19. leopold Valued Senior Member

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    now THAT i call a party animal!

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  20. Absane Rocket Surgeon Valued Senior Member

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    8,989
    But that is only if you treat infinity like a number. In actuality, it's not a number.
     
  21. Absane Rocket Surgeon Valued Senior Member

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    8,989
    Shit man.. I do that all the time

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  22. invert_nexus Ze do caixao Valued Senior Member

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    Absane,

    A hint for you.

    *looks around furtively*

    Truthseeker is not too bright...
     
  23. Absane Rocket Surgeon Valued Senior Member

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    8,989
    Since I am usually a nice guy, I won't comment.

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