Recent content by mathgenie

  1. mathgenie

    I Taking the derivative of a function

    Dear all, I just wanted to thank those of you for taking a look at my post and providing suggestions. Forums like these are invaluable and although I did not get an answer to my question (no doubt due to poor phrasing of the question) I appreciate all of your time and effort in considering this...
  2. mathgenie

    I Taking the derivative of a function

    It's just for my personal interest.
  3. mathgenie

    I Taking the derivative of a function

    To reiterate, I am looking for the derivative of the difference equation ##f(G)=\mathrm{G}_{t+1}-\mathrm{G}_{t}## with respect to G.
  4. mathgenie

    I Taking the derivative of a function

    I’ve given as much info as I can at the moment. If I was a math boff I wouldn’t be asking for help!
  5. mathgenie

    I Taking the derivative of a function

    I think a clue is that F(G)=Gt+1 -Gt and we want F’(G)
  6. mathgenie

    I Taking the derivative of a function

    Can you see the latex equation?
  7. mathgenie

    I Taking the derivative of a function

    I would like to take the derivative of the following function with respect to Gt: $$\mathrm{G}_{t+1}=\mathrm{g}_{0}\mathrm{e}^{-qHt}$$ I think that the answer is either -1 or ##\mathrm{e}^{-qHt}-1## If you could show the calculations that would be a great help. Thanks very much.
  8. mathgenie

    MHB How to Solve the Lotka-Volterra System of Differential Equations?

    Sorry I know that this is an old post, but has anyone been able to estimate the values of the parameters W(0), V(0), A, C, and T using curve fitting? I have come close, with W(0)= 0.00548, V(0)= -0.00507, A=-0.00725, C=-0.00365 and T=100 but I am sure that a better fit is possible.
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