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- University of BergenNO259 papers
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330 papers
Edge Geography is XNLP-hard for Pathwidth and in XP for Tree-Partition Width
Thobias Kvalvik Høivik, Erlend Raa Vågset
Directed Edge Geography and Undirected Edge Geography are classical PSPACE-complete two-player graph games in which players alternately make moves along edges, deleting each one af…
Minkowski-Space Modeling of Hyperbolic Lenses
Enrico Maria Renzi, Simon Yves, Sveinung Erland +3
The extreme anisotropy of hyperbolic materials enables extreme wave confinement, but it is also associated with an inherent misalignment between phase and energy flow, which compli…
ETH-Tight Complexity of Optimal Morse Matching on Bounded-Treewidth Complexes
Geevarghese Philip, Erlend Raa Vågset
The Optimal Morse Matching (OMM) problem asks for a discrete gradient vector field on a simplicial complex that minimizes the number of critical simplices. It is NP-hard and has be…
Fast proton transport and neutron production in proton therapy using Fourier neural operators
Francesco Blangiardi, Hunter N. Ratliff, Fabian Teichert +3
Objective: Real-time adaptive proton range verification systems based on produced neutrons require accurate information on their non-isotropic momentum distributions within short t…
GOOFy -- a systematic approach
Bohdan Grzadkowski, Odd Magne Ogreid
We investigate in detail a new class (GOOFy) of transformations for bosonic and fermionic fields that leave the Lagrangian density unchanged. The transformations act upon complex s…
CP violation in H^\pm \to W^\pm Z: A physical approach for the 2HDM
Wafaa Khater, Odd Magne Ogreid, Per Osland +1
We investigate CP violation in the process H^\pm \to W^\pm Z within the framework of the two-Higgs-Doublet model (2HDM). Amplitudes are expressed transparently in terms of physical…