Spherical Harmonics Homework: Calculate Coeficients & Express Function

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SUMMARY

This discussion focuses on calculating coefficients and expressing functions using spherical harmonics, specifically the function f(θ, φ) = sin(θ). The participants emphasize the importance of understanding the relationship between spherical harmonics and Fourier series, highlighting that expressing a function in terms of spherical harmonics involves solving equations for coefficients. The forum also encourages the use of LaTeX for clearer mathematical communication.

PREREQUISITES
  • Understanding of spherical harmonics and their applications
  • Familiarity with LaTeX for mathematical expressions
  • Basic knowledge of Fourier series and their representation
  • Ability to solve equations for coefficients in series expansions
NEXT STEPS
  • Study the derivation of spherical harmonics and their properties
  • Learn how to calculate coefficients for spherical harmonics using integrals
  • Explore the relationship between spherical harmonics and Fourier series
  • Practice writing functions in terms of spherical harmonics with examples
USEFUL FOR

Students and researchers in physics or mathematics, particularly those studying wave functions, quantum mechanics, or any field requiring the use of spherical harmonics for function representation.

pgerlein
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Homework Statement



Hi! I need help with this. I have to calculate the expression of a function using spherical harmonics. The relevant equations are given below. An example of a function can be f(theta,phi) = sin(theta)... Can you help me to calculate de coeficients and to express the function? Thanks.


Homework Equations



View attachment formulas.doc

The Attempt at a Solution

 
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Hola pgerlein. Welcome to PF:smile:

Why don't you show us what you've tried for your example (f(\theta,\phi)=sin(\theta)) and we'll know how to help you better.

To make equation writing easier, this forum supports LaTeX. You can find an introduction to using it by clicking here
 
I can´t understand the use of this base (spherical harmonics). If I solve the ecuation that gives the coefficients value, how can I express the function in terms of the spherical harmonics?
 
How would you express a function in terms of a Fourier series, for example? Essentially it's the same idea when you write any function in terms of an infinite series of basis functions.
 

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