# Wentzel

Computation of Steklov or Wentzell eigenvalues.

Uses radial representation for the shape in terms of Fourier coefficients.

Parametrization uses a vector of the form.

vec = [a0, as, bs] where as are coefficients of cos and bs coefficients of sin

## Variational form

$\displaystyle{ \int_{\Omega}{\nabla\mathbf{u}:\nabla\mathbf{v}} + \beta\int_{\partial\Omega}{\nabla_{\tau}\mathbf{u}:\nabla_{\tau}\mathbf{v}} = \lambda\int_{\Omega}{\mathbf{u}\cdot\mathbf{v}} }$

Wifi propagation

## References

B. Bogosel, The method of fundamental solutions applied to boundary eigenvalue problems, 2016, Journal of Computational and Applied Mathematics

## Authors

Author: Beniamin Bogosel