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74 papers · 1 filter
Simple algebras of Gelfand-Kirillov dimension two
Jason P. Bell
Let be a field. We show that a finitely generated simple Goldie -algebra of quadratic growth is noetherian and has Krull dimension 1. Thus a simple algebra of quadratic grow…
Computing knock out strategies in metabolic networks
Utz-Uwe Haus, Steffen Klamt, Tamon Stephen
Given a metabolic network in terms of its metabolites and reactions, our goal is to efficiently compute the minimal knock out sets of reactions required to block a given behaviour.…
On the approximability of the vertex cover and related problems
Qiaoming Han, Abraham P. Punnen
In this paper we show that the problem of identifying an edge in a graph such that there exists an optimal vertex cover of containing exactly one of the nodes $…
Model-independent measurement of the W boson helicity in top quark decays
D0 Collaboration, V. M. Abazov
We present the first model-independent measurement of the helicity of bosons produced in top quark decays, based on a 1 fb sample of candidate events in the d…
Cayley sum graphs and eigenvalues of -fullerenes
Matt DeVos, Luis Goddyn, Bojan Mohar +1
We determine the spectra of cubic plane graphs whose faces have sizes 3 and 6. Such graphs, "(3,6)-fullerenes", have been studied by chemists who are interested in their energy spe…
High multipole transitions in NIXS: valence and hybridization in 4f systems
R. A. Gordon, G. T. Seidler, T. T. Fister +4
Momentum-transfer (q) dependent non-resonant inelastic x-ray scattering measurements were made at the N4,5 edges for several rare earth compounds. With increasing q, giant dipole r…