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In inversive geometry, which deals with the space C [f1g and the group of Mobius transformations, the properties of circles are well-known. In particular, the image of a line or circle under a M obius transformation is another line or circle. Some interesting questions arise when considering the actions of Mobius transformations on ellipses. Of course the circle could be considered a special...
The increasing rate of growth in size of currently available datasets is a well known issue. The possibility of developing fast and easy to implement frameworks able to visualize at least part of a tera-sized volume is a challenging task. Several techniques have been proposed in recent years ranging from simplification to wavelet analysis. Subdivision methods have been one of the most successfu...
The synthesis, structural characterization, electrical transport, optical, and magnetic properties of a new cation-radical salt, bis(ethylenedithio)tetrathiafulvalene hexafluorophosphate, ú-(BEDT-TTF)PF6, are reported. The X-ray structure was determined at 298 K and at 173 K. The primary difference at the two temperatures is that the PF6 anions are disordered at 298 K and ordered at 173 K. At 2...
Most transplanted kidneys are from cadavers, but there are also substantial numbers of transplants from live donors. Recently, there have started to be kidney exchanges involving two donor-patient pairs such that each donor cannot give a kidney to the intended recipient because of immunological incompatibility, but each patient can receive a kidney from the other donor. Exchanges are also made ...
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