Understanding the Notation: Deciphering the Equation in the Image

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Discussion Overview

The discussion revolves around understanding the notation and meaning of an equation presented in an image. Participants explore the implications of a Monge parameterization height function, boundary conditions for a differential equation, and the interpretation of partial derivatives within the context of the equation.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant seeks clarification on the meaning of an equation, noting that h(p) is a Monge parameterization height function dependent on radius (p) and that it serves as a boundary condition for a differential equation.
  • Another participant interprets the notation as indicating the partial derivative with respect to ##\rho## evaluated at ##\rho=\rho_0##, suggesting a specific method of evaluation.
  • A different participant agrees with the interpretation of the derivative but questions why the operator is not expressed as d/dp instead.
  • Another participant speculates that the author may have been imprecise, suggesting that the equation appears to depend solely on ##\rho##, which could justify using ##\frac{d}{d\rho}##.

Areas of Agreement / Disagreement

Participants express differing interpretations of the notation and its implications, indicating that multiple competing views remain without a clear consensus on the correct approach.

Contextual Notes

There are unresolved assumptions regarding the notation and the specific dependencies of the variables involved, which may affect the interpretation of the equation.

lucdj3
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Can you help me figure out what the equation in the attached image means?
What I do know is: h(p) is a Monge parameterization height function depending on radius (p), this is a boundary condition for a differential equation, and p0 is the outer boundary, with the inner boundary creating a boundary condition of h(pi)=0.
Thanks!
 

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I wasn't sure where this thread should be posted, so if there would have been a better place, please let me know and I will re-post there
 
To me this read: The partial derivative with respect to ##\rho## evaluated at ##\rho=\rho_0##.
As in take the derivative first and then set ##\rho=\rho_0##.
I could be wrong though.
 
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That seems reasonable. Short term it is yielding something that doesn't look wrong, once I get through everything else I'll be able to tell if it's right. Thanks!
Any idea why it wouldn't be d/dp as the operator out front?
 
Maybe the author is being sloppy because it looks like it only depends on ##\rho## and therefore it could be derived with ##\frac{d}{d\rho}##.
 
Well it worked it, thanks!
 

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