The computational solution of problems can be restricted by the availability of solution
methods for linear (ized) systems of equations. In conjunction with iterative methods …

Modelling methods are nowadays at the heart of any geophysical interpretation approach.
These are heavily relied upon by imaging techniques in elastodynamics and …

Full-wavefield seismic inversion (FWI) estimates a subsurface elastic model by iteratively
minimizing the difference between observed and simulated data. This process is extremely …

Solving time-harmonic wave propagation problems by iterative methods is a difficult task,
and over the last two decades an important research effort has gone into develo** …

In this article we describe recent progress on the design, analysis and implementation of
hybrid numerical-asymptotic boundary integral methods for boundary value problems for the …

This paper introduces a new swee** preconditioner for the iterative solution of the
variable coefficient Helmholtz equation in two and three dimensions. The algorithms follow …

Full waveform inversion (FWI) of surface seismic data requires low-frequency and long-offset
data, namely diving waves or post-critical reflections, to update the long wavelength features …

The paper introduces the swee** preconditioner, which is highly efficient for iterative
solutions of the variable‐coefficient Helmholtz equation including very‐high‐frequency …

When simulating a mechanism from science or engineering, or an industrial process, one is
frequently required to construct a mathematical model, and then resolve this model …

With the acquisition of wide-aperture seismic data sets, full-waveform inversion is an
attractive method for deriving velocity models. Three-dimensional implementations require …