Orthogonal Functions: Questioning the Reason Why

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SUMMARY

The discussion centers on the orthogonality of eigenfunctions associated with a linear operator \(\mathcal{L}\). It is established that eigenfunctions \(\phi_n\) of a self-adjoint operator are orthogonal due to the properties of inner products in Hilbert spaces. The referenced material provides a concise explanation of this principle, emphasizing the mathematical foundations that guarantee orthogonality in quantum mechanics and functional analysis.

PREREQUISITES
  • Understanding of linear operators in functional analysis
  • Familiarity with eigenvalues and eigenfunctions
  • Knowledge of inner product spaces
  • Basic concepts of quantum mechanics
NEXT STEPS
  • Study the properties of self-adjoint operators in functional analysis
  • Learn about Hilbert spaces and their applications in quantum mechanics
  • Explore the mathematical proof of eigenfunction orthogonality
  • Investigate the implications of orthogonality in quantum state functions
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Students and professionals in mathematics, physics, and engineering, particularly those focusing on quantum mechanics and functional analysis.

Logarythmic
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A question for my understanding:

If I have an operator [tex]\cal{L}[/tex] and a set of eigenfunctions [tex]\phi_n[/tex] of this operator, then the eigenfunctions are orthogonal. Why is that?
 
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Logarythmic said:
A question for my understanding:

If I have an operator [tex]\cal{L}[/tex] and a set of eigenfunctions [tex]\phi_n[/tex] of this operator, then the eigenfunctions are orthogonal. Why is that?
Here is a short read on this issue.

http://vergil.chemistry.gatech.edu/notes/quantrev/node16.html
 

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