Is a solution of a differential equation a function of its parameters?

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Discussion Overview

The discussion revolves around the relationship between solutions of differential equations and their parameters, specifically in the context of linear differential equations like the Maxwell equations. Participants explore whether the electric field solution can be considered a function of parameters such as conductivity.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant suggests that the electric field solution, $E$, can be expressed as a function of conductivity, $\sigma$, indicating a relationship between the solution and the parameters involved.
  • Another participant agrees, stating that the solution at a specific point and time is determined by the parameters and the initial and boundary conditions, implying a dependence on these factors.
  • A third participant reiterates the previous point, emphasizing that the solution is influenced by the parameters and conditions set for the system.
  • Additionally, a participant notes that differential equations describe a family of solutions, with boundary conditions and initial parameters determining a specific solution from that family.

Areas of Agreement / Disagreement

Participants generally agree that the solution of a differential equation is influenced by its parameters and initial/boundary conditions. However, the discussion does not resolve whether this relationship is universally applicable or if there are exceptions.

Contextual Notes

The discussion does not address potential limitations or specific conditions under which the proposed relationships hold true, leaving some assumptions and dependencies on definitions unresolved.

Meaning
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Hi everyone,

Imagine I have a system of linear differential equations, e.g. the Maxwell equations.

Imagine my input variables are the conductivity $\sigma$. Is it correct from the mathematical point of view to say that the electric field solution, $E$, is a function of sigma in general, E(r,t,sigma)?

Thank you
 
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Yes. Unless something weird is going on, the value of the solution at a particular point and time is determined by the parameters and the initial and boundary conditions.
 
pasmith said:
Yes. Unless something weird is going on, the value of the solution at a particular point and time is determined by the parameters and the initial and boundary conditions.

Thank you
 
Basically, any differential equation describes a family of curves, surfaces, volumes...

It's the boundary conditions and initial parameters that fix it to one curve, surface or volume...
 

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