Physical significance of Eigenvalues and Eigenvector?

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Discussion Overview

The discussion centers on the physical significance of eigenvalues and eigenvectors, exploring their implications in various contexts such as quantum mechanics, classical mechanics, and engineering applications like signal processing and frequency response. Participants seek to understand how these mathematical concepts translate into physical interpretations.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant inquires about the physical significance of eigenvalues and eigenvectors, particularly in relation to signal processing and frequency response.
  • Another participant notes that the meanings of eigenvalues and eigenvectors can differ significantly between quantum and classical contexts.
  • A participant emphasizes that the question of physical significance is fundamentally a physics question rather than a purely mathematical one.
  • It is suggested that the physical significance of an eigenvector is contingent upon the physical interpretation of the matrix from which it derives.
  • One participant argues that eigenvalues and eigenvectors are valuable in engineering, particularly in solving dynamic equations, and raises the question of how to interpret the physical significance of multiplying a signal by a transfer function.

Areas of Agreement / Disagreement

Participants express differing views on the physical significance of eigenvalues and eigenvectors, indicating that multiple competing interpretations exist. The discussion remains unresolved regarding a unified understanding of their significance across different contexts.

Contextual Notes

Participants acknowledge that the interpretation of eigenvalues and eigenvectors may depend on specific applications and contexts, which introduces limitations in generalizing their physical significance.

kgirish
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I want to know what exactly Eigen value imply. What is its Physical significance ? Physical significance of eigen vector? Does eigen value concept apply in signal processing or evalvating frequency response off a system?
 
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Quantum or classical? Eigen values and eigen vectors have different meanings in different contexts.
 
The "physical significance" of something is a physics question, not a mathematics question.
 
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The physical significance of an eigenvector depends on the physical significance of the matrix that it comes from.
 
Eigenvalues are very useful in engineering as are differential equations and Lapace transforms, and frequency response. I'll wager you think of frequency response as something physical, but all these things are math methods that make some things easier to visualize and to manipulate.

See https://en.m.wikipedia.org/wiki/Eigenvalue,_eigenvector_and_eigenspace#Dynamic_equations to see their general usefulness to solving dynamic equations.

As DaleSpam said, the actual physical significance depends on the application, and there are many such.

If you work in signal processing someone might ask you "what is the physical significance of multiplying a signal by a transfer function?" How would you answer?
 

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