3 citations · 3 across the 3 of their papers we have counts for
4 papers
The method of the weakly conjugate operator: Extensions and applications to operators on graphs and groups
M. Mantoiu, S. Richard, R. Tiedra de Aldecoa
In this review we present some recent extensions of the method of the weakly conjugate operator. We illustrate these developments through examples of operators on graphs and groups…
Time delay for dispersive systems in quantum scattering theory. I. The Friedrichs model
Rafael Tiedra de Aldecoa
We present a method for proving the existence of time delay (defined in terms of sojourn times) as well as its identity with Eisenbud-Wigner time delay in the case of the Friedrich…
Spectral analysis for convolution operators on locally compact groups
Marius Mantoiu, Rafael Tiedra de Aldecoa
We consider operators of convolution with measures on locally compact groups. We characterize the spectrum of by constructing auxiliary operators whose kernel conta…
On the spectrum of magnetic Dirac operators with Coulomb-type perturbations
Serge Richard, Rafael Tiedra de Aldecoa
We carry out the spectral analysis of singular matrix valued perturbations of 3-dimensional Dirac operators with variable magnetic field of constant direction. Under suitable assum…