How to Simplify the Laplace Equation in Spherical Coordinates?

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SUMMARY

The discussion focuses on simplifying the Laplace equation in spherical coordinates using the function f(r,θ,φ)=Rl(r)Ylm(θ,φ). Participants emphasize the importance of understanding the Laplace operator's action on the function components, particularly how the radial part Rl(r) interacts with the angular part Ylm(θ,φ). The concept of "separability" is highlighted as a key principle for solving the problem, suggesting that breaking down the equation into its components can facilitate simplification.

PREREQUISITES
  • Understanding of the Laplace operator in mathematical physics
  • Familiarity with spherical coordinates and their applications
  • Knowledge of spherical harmonics, specifically Ylm(θ,φ)
  • Basic proficiency in solving partial differential equations
NEXT STEPS
  • Research the properties of the Laplace operator in spherical coordinates
  • Study the method of separation of variables in partial differential equations
  • Explore the derivation and applications of spherical harmonics Ylm(θ,φ)
  • Practice solving similar problems involving the Laplace equation in various coordinate systems
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Students and researchers in mathematical physics, particularly those studying potential theory and partial differential equations, will benefit from this discussion.

physicss
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Homework Statement
Hello, how can I simplify ∆f(r,θ,φ) by using f(r,θ,φ)=Rl(r)Ylm(θ,φ)?
Relevant Equations
f(r,θ,φ)=Rl(r)Ylm(θ,φ)
I know what the Laplace operator is and I also looked up how f(r,θ,φ)=Rl(r)Ylm(θ,φ) is defined but I still could not solve the problem.
 
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physicss said:
Homework Statement: Hello, how can I simplify ∆f(r,θ,φ) by using f(r,θ,φ)=Rl(r)Ylm(θ,φ)?
Relevant Equations: f(r,θ,φ)=Rl(r)Ylm(θ,φ)

I know what the Laplace operator is and I also looked up how f(r,θ,φ)=Rl(r)Ylm(θ,φ) is defined but I still could not solve the problem.
What does the Laplace operator look like in spherical polar coordinates? If you then have this operator act on the following
f(r,θ,φ)=Rl(r)Ylm(θ,φ)
what happens when the "r" part of the operator hits the "Y" part of the function? And similarly for the angle parts acting on Rl(r)?

The buzzword is "separability." You can probably get quite a lot of help by googling this.
 
physicss said:
I know what the Laplace operator is and I also looked up how f(r,θ,φ)=Rl(r)Ylm(θ,φ) is defined but I still could not solve the problem.
Can you state the problem that you still cannot solve?
According to our rules, to receive help, you need to show some credible effort towards answering the question. How about showing us what you tried and where you got stuck? We need something to work from.
 

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