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25 papers · 1 filter
Physical accessibility of non-completely positive maps
Hilary Carteret, Daniel R. Terno, Karol Zyczkowski
Maps that are not completely positive (CP) are often useful to describe the dynamics of open systems. An apparent violation of complete positivity can occur because there are prior…
A New Population of Planetary Nebulae Discovered in the Large Magellanic Cloud (I): Preliminary Sample
Warren A. Reid, Quentin A. Parker
We report our initial discovery of 73 new planetary nebulae (PNe) in the Large Magellanic Cloud (LMC) following confirmatory 2dF spectroscopy on the Anglo-Australian Telescope (AAT…
Planar coincidences for N-fold symmetry
Peter A. B. Pleasants, Michael Baake, Johannes Roth
The coincidence problem for planar patterns with -fold symmetry is considered. For the N-fold symmetric module with , all isometries of the plane are classified that resul…
Saari's Conjecture is True for Generic Vector Fields
Tanya Schmah, Cristina Stoica
The simplest non-collision solutions of the N-body problem are the "relative equilibria", in which each body follows a circular orbit around the centre of mass and the shape formed…
A Multi-Wavelength Study of Sgr A*: The Role of Near-IR Flares in Production of X-ray, Soft -ray and Sub-millimeter Emission
F. Yusef-Zadeh, H. Bushouse, C. D. Dowell +8
(abridged) We describe highlights of the results of two observing campaigns in 2004 to investigate the correlation of flare activity in Sgr A* in different wavelength regimes, usin…
Structure and dynamics of the Shapley Supercluster
Dominique Proust, Hernan Quintana, Eleazar R Carrasco +8
We present results of our wide-field redshift survey of galaxies in a 285 square degree region of the Shapley Supercluster (SSC), based on a set of 10529 velocity measurements (inc…