Thread: Odd math

  1. #16
    (?<!re)tired Mario F.'s Avatar
    Join Date
    May 2006
    I think what Bubba was referring was to Happy_Reaper's reply. Fixed points, not intersections.

    Quote Originally Posted by Bubba
    What is it called when you take a value and perform an operation on it and return the identical value?
    It is obvious that both functions intersect at the fixed point since both functions cancel each other.
    Originally Posted by brewbuck:
    Reimplementing a large system in another language to get a 25% performance boost is nonsense. It would be cheaper to just get a computer which is 25% faster.

  2. #17
    The Right Honourable psychopath's Avatar
    Join Date
    Mar 2004
    Where circles begin.
    Quote Originally Posted by Bubba
    Yeah and inches, quarts, miles per hour, and pounds per foot (instead of newton meters).
    I wish you people would stop being so stuck-up and switch to metric.
    M.Eng Computer Engineering Candidate
    B.Sc Computer Science

    Robotics and graphics enthusiast.

  3. #18
    The superhaterodyne twomers's Avatar
    Join Date
    Dec 2005
    >> I wish you people would stop being so stuck-up and switch to metric.

    Heh. I agree .... what was that quote ...

    Grandpa Simpson: The Metric System is the tool of the devil! My car gets five rods to the hog's head and that's the way I likes it!

    BTW, there are worse things than pounds per square inch in mech eng!!

  4. #19
    Join Date
    Jul 2005
    This always happens whenever you have a linear relationship of the form f(x) = mx + b, where m != 1. You'll find that f(x) = x when x = b/(1-m).

    What you have are two linear functions that are inverses of each other (by design, since converting from Fahrenheit to Celcius to Fahrenheit should give you the same temperature), and since one has a fixed point, the inverse must have the same fixed point.

    You'll find the same thing with, say, g(x) = 2x + 3 and h(x) = (1/2)(x-3).

    Every non-constant linear function has an inverse function, and they'll always have the same effect.
    There are 10 types of people in this world, those who cringed when reading the beginning of this sentence and those who salivated to how superior they are for understanding something as simple as binary.

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