Calculus for Dummies?

Discussion in 'Off-Topic' started by thingmaker3, Dec 16, 2005.

  1. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    I thought about posting this in "homework" but it is not school related - just hobby stuff...

    Is there an easy way to solve second-order differential equations? Specifically, I would like to solve the equations found on this web page.

    Can someone steer me toward a website explaining "erf" and "exp?"

    My hope is to be able to graph carbon concentration versus depth for a given temperature, time, and starting carbon concentration.

    Thank you.
     
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
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  3. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    Not making my own steel yet, though a buddy of mine is doing so.

    I'm into blacksmithing and knife-making. Decarburisation of the steel during forging and heat treating is a concern with some steels and some procedures. I'm just looking for the boundries of the "ballpark."

    Edit And thank you for those links! I will wade through them as best I can.
     
  4. Dave

    Retired Moderator

    Nov 17, 2003
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    You find the MathWorld site a little daunting to read, try: http://en.wikipedia.org/wiki/Error_function

    You may also want to do a search for "Error Function Tables", which will give the solution to erfc(x) for different values of x. Its a little easilr than wading through the calculus.

    Exp is just the simple exponential function, defined as:

    e^x = 1 + x + x^2/2! + x^3/3! + x^4/4! .........

    And this is easily solved with many calculators.

    Dave
     
  5. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    Sweet! Thanks Dave! Thirty seconds on Google was all it took to find an error function table!
     
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