Volterra Equations: Applications in Physics

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Discussion Overview

The discussion revolves around the applications of Volterra equations in various physical phenomena. Participants explore the contexts in which these equations are utilized, particularly in comparison to traditional equations like those for heat, diffusion, and wave phenomena.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant, Alex, inquires about the specific physical phenomena where Volterra equations are applied, questioning whether they serve as a dual representation or have distinct reasons for use.
  • Another participant provides a mathematical formulation, illustrating the equivalence of a differential equation to a Volterra integral equation of the second kind, emphasizing the variable upper bound of the integral.
  • Alex clarifies that they are not seeking definitions but rather practical examples of when Volterra equations are encountered in real-world phenomena, suggesting inverse problems as a potential context.
  • A later reply questions whether the previous mathematical explanation constitutes a definition, indicating a possible misunderstanding of the original inquiry.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the specific applications of Volterra equations, with some focusing on definitions and others seeking practical examples. The discussion remains unresolved regarding the contexts in which these equations are most relevant.

Contextual Notes

The discussion highlights a lack of clarity regarding the practical applications of Volterra equations, with participants expressing differing focuses on definitions versus applications. There is also an indication of potential misunderstandings in the communication of ideas.

alecrimi
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Hi Guys!
I have a (stupid) question. In which physical phenomena do you use Volterra equations (or similar equations) ?
I mean if we go back to traditional heat,diffusion,wave, transport... and so on we know more or less when to use them. Are integral equation just a dual representation or is there a specific reason to use them ?
Thanx
Alex
 
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A differential equation:

<br /> y&#039; = f(x, y)<br />

with the initial condition y(x_{0}) = y_{0} is equivalent to the integral equation:

<br /> y(x) = y_{0} + \int_{x_{0}}^{x}{f(t, y(t)) \, dt}<br />

This is a Volterra (since the upper bound of the integral is variable) integral equation of the second kind (since the unknown function y(x) is both under the integral and outside).
 
Probably my question was not clear. I didn't ask for a definition (everybody can look up wikipedia), I asked when do you need to use them ?
some inverse problem... for example ? I am asking when did you meet them, in which phenomena ?
 
Last edited:
Is what I typed a definition?
 

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