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34 papers · 1 filter
UWISH2 -- The UKIRT Widefield Infrared Survey for H2
D., Froebrich, C. J. +56
We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the First Galactic Quadrant (10deg<l<65deg ; -1.3deg<b<+1.3deg). This area…
Generalized Species Sampling Priors with Latent Beta reinforcements
Edoardo M. Airoldi, Thiago Costa, Federico Bassetti +2
Many popular Bayesian nonparametric priors can be characterized in terms of exchangeable species sampling sequences. However, in some applications, exchangeability may not be appro…
Metric operators for non-Hermitian quadratic su(2) Hamiltonians
Paulo E. G. Assis
A class of non-Hermitian quadratic su(2) Hamiltonians having an anti-linear symmetry is constructed. This is achieved by analysing the possible symmetries of such systems in terms…
Relative Invariants, Ideal Classes and Quasi-Canonical Modules of Modular Rings of Invariants
Peter Fleischmann, Chris Woodcock
We describe "quasi canonical modules" for modular invariant rings of finite group actions on factorial Gorenstein domains. From this we derive a general "quasi Gorenstein crite…
Non-linear Group Actions with Polynomial Invariant Rings and a Structure Theorem for Modular Galois Extensions
Peter Fleischmann, Chris Woodcock
Let be a finite -group and a field of characteristic . We show that has a \emph{non-linear} faithful action on a polynomial ring of dimension $n=\mathrm{log…
On non-rigid del Pezzo fibrations of low degree
Hamid Abban
We consider bundles over and construct hypersurfaces of these bundles which form a degree 2 del Pezzo fibration over as a Mori f…