Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Natural log in PDE

  1. Oct 17, 2011 #1
    Is the following relationship true?:

    [itex]\frac{\partial (ln(k))}{\partial P}=\frac{1}{k}\frac{\partial k}{\partial P}[/itex]

    I am getting both of these terms from a paper on mineral physics and they seem to use both terms interchangeably. If so, how are these related?
     
  2. jcsd
  3. Oct 17, 2011 #2

    lurflurf

    User Avatar
    Homework Helper

    log'(k)=1/k
    So yes that is true except at zero or crossing branch cuts.
     
  4. Oct 21, 2011 #3
    According to the chain rule, yes
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Natural log in PDE
  1. Linearity of PDE (Replies: 4)

Loading...