36 citations · 94 across the 6 of their papers we have counts for
7 papers
Variational regularization of the weighted conical Radon transform
Markus Haltmeier, Daniela Schiefeneder
Recovering a function from integrals over conical surfaces recently got significant interest. It is relevant for emission tomography with Compton cameras and other imaging applicat…
Singular Support of Minimizers of the Causal Variational Principle on the Sphere
Lucia Bäuml, Felix Finster, Daniela Schiefeneder +1
The support of minimizing measures of the causal variational principle on the sphere is analyzed. It is proven that in the case , the support of every minimizing measur…
Inversion of the attenuated V-line transform for SPECT with Compton cameras
Markus Haltmeier, Sunghwan Moon, Daniela Schiefeneder
The Compton camera is a promising alternative to the Anger camera for imaging gamma radiation, with the potential to significantly increase the sensitivity of SPECT. Two-dimensiona…
The Radon Transform over Cones with Vertices on the Sphere and Orthogonal Axes
Daniela Schiefeneder, Markus Haltmeier
Recovering a function from its integrals over circular cones recently gained significance because of its relevance to novel medical imaging technologies such emission tomography us…
Causal Fermion Systems: A Quantum Space-Time Emerging from an Action Principle
Felix Finster, Andreas Grotz, Daniela Schiefeneder
Causal fermion systems are introduced as a general mathematical framework for formulating relativistic quantum theory. By specializing, we recover earlier notions like fermion syst…
On the Support of Minimizers of Causal Variational Principles
Felix Finster, Daniela Schiefeneder
A class of causal variational principles on a compact manifold is introduced and analyzed both numerically and analytically. It is proved under general assumptions that the support…
Fermion Systems in Discrete Space-Time Exemplifying the Spontaneous Generation of a Causal Structure
Alexander Diethert, Felix Finster, Daniela Schiefeneder
As toy models for space-time on the Planck scale, we consider examples of fermion systems in discrete space-time which are composed of one or two particles defined on two up to nin…