List questions from eigenfunctions

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can the first eigenfunction of the Dirichlet Laplacian have any saddle points

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Is Helmholtz equation in arbitrary regular polygon solvable in closed form?

Published on 17 Dec 2013 - 9:51

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Eigenvalue problem for the Laplacian on the unit ball

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"Fixed Domains" of a Linear Transformation

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Convert an eigenvalue equation to ODE/s

Published on 26 Mar 2026 - 16:02

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Eigenvalues of $\frac{d^2}{dx^2}$ in $C^2(\mathbb{R})$

Published on 07 Jan 2014 - 3:05

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Eigenfunctions.

Published on 19 Jan 2014 - 10:35

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Completeness of eigenvectors of Hermitian Matrix.

Published on 28 Jan 2014 - 13:34

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Eigenvalues of self-adjoint eigenvalue problem

Published on 31 Jan 2014 - 13:10

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Which function satisfies the conditions?

Published on 27 Mar 2026 - 8:55

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Stuck in finding Eigen values

Published on 16 Feb 2014 - 13:53

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Sturm-Liouville boundary value problem with two different eigenfunctions

Published on 27 Feb 2014 - 15:05

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Making an argument regarding the minimum characteristic polynomial rigorous.

Published on 14 Apr 2017 - 9:32

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Normal derivative of the First Dirichlet eigenfunction

Published on 27 Mar 2026 - 10:06

List Question

A diffusion partial differential equation, or Sturm-Liouville eigenvalue ODE

can the first eigenfunction of the Dirichlet Laplacian have any saddle points

Is Helmholtz equation in arbitrary regular polygon solvable in closed form?

Eigenvalue problem for the Laplacian on the unit ball

"Fixed Domains" of a Linear Transformation

Convert an eigenvalue equation to ODE/s

Eigenvalues of $\frac{d^2}{dx^2}$ in $C^2(\mathbb{R})$

Eigenfunctions.

Completeness of eigenvectors of Hermitian Matrix.

Eigenvalues of self-adjoint eigenvalue problem

Which function satisfies the conditions?

Stuck in finding Eigen values

Sturm-Liouville boundary value problem with two different eigenfunctions

Making an argument regarding the minimum characteristic polynomial rigorous.

Normal derivative of the First Dirichlet eigenfunction

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