18. Eigenfunction Expansion Method
The Eigenfunction Expansion Method provides a systematic approach for solving linear partial differential equations (PDEs) by utilizing the properties of eigenfunctions from Sturm–Liouville problems. It allows the representation of solutions as infinite series, connecting concepts from linear algebra, differential equations, and Fourier analysis. This method is particularly effective for boundary value problems, enabling efficient solution derivation under various conditions.
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What we have learnt
- The Eigenfunction Expansion Method is critical for solving linear PDEs.
- Eigenfunctions derived from Sturm-Liouville problems play a key role in this method.
- Separating variables to form a series solution is fundamental in applying this method.
Key Concepts
- -- Eigenfunction Expansion Method
- An analytical technique for solving linear partial differential equations (PDEs) that represents solutions as a series of eigenfunctions.
- -- SturmLiouville Problems
- A type of differential equation that leads to the determination of eigenvalues and eigenfunctions, critical for the expansion method.
- -- Orthogonality
- A property of eigenfunctions that ensures they are mutually perpendicular under a weighted inner product, simplifying calculations of coefficients in expansions.
- -- Boundary Value Problems (BVPs)
- Problems that seek solutions to differential equations subject to specific conditions at the boundaries of the domain.
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