krylov

emg3d.solver.krylov(model, sfield, efield, var)

Krylov subspace solver for three-dimensional electromagnetic diffusion.

Using a Krylov subspace iterative solver (defined in var.sslsolver) implemented in SciPy with or without multigrid as a pre-conditioner ([Muld06]).

• The electric field is stored in-place in efield.

• The current error (l2-norm) is stored in var.l2.

• The reference error (l2-norm of sfield) is stored in var.l2_refe.

This function is called by emg3d.solver.solve.

Parameters:

modelVolumeModel

Input model; a emg3d.models.Model instance.

sfieldField

The source field; a emg3d.fields.Field instance.

efieldField

The electric field; a emg3d.fields.Field instance.

varMGParameters

A multigrid parameter instance used within emg3d.solver.multigrid.