Re: eigenvalue problem

[Konstantinos Poulios]

Dear Guillaume Dupont,

Unfortunately GetFEM does not provide functions for eigenvalue analysis. As you assumed you need to use the assembled matrices from GetFEM to calculate eigenvalues/vectors with an external solver. You can convert from SpMat to scipy.sparse e.g. with:

M = scipy.sparse.csc_matrix((M.csc_val(),*(M.csc_ind()[::-1])))

Best regards

Kostas

On Mon, Oct 18, 2021 at 9:24 AM Guillaume Dupont <guillaume.dupont@geocorail.com> wrote:

Dear getfem users,

I'm trying to solve the eigenvalue problem of Helmholtz equation.
Is there a simple way to do it with getfem with the python api ?
And another thing, is there a command in getfem to pass Spmat arrays to numpy sparse ?

Best regards

--

Guillaume Dupont

Ingénieur d’études / Design Engineer

+33.(0).6.25.51.00.05