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38 papers · 1 filter
A note on the Gauss map of complete nonorientable minimal surfaces
Francisco J. Lopez, Francisco Martin
We construct complete nonorientable minimal surfaces whose Gauss map omits two points of the projective plane. This result proves that Fujimoto's theorem is sharp in nonorientable…
Impediments to mixing classical and quantum dynamics
J. Caro, L. L. Salcedo
The dynamics of systems composed of a classical sector plus a quantum sector is studied. We show that, even in the simplest cases, (i) the existence of a consistent canonical descr…
Some semi-Riemannian volume comparison theorems
Paul E. Ehrlich, Miguel Sanchez
Lorentzian versions of classical Riemannian volume comparison theorems by Gunther, Bishop and Bishop-Gromov, are stated for suitable natural subsets of general semi-Riemannian mani…
Fabry-Perot observations of the ionized gas in NGC 3938
J. Jimenez-Vicente, E. Battaner, M. Rozas +2
The nearly face-on spiral galaxy NGC 3938 has been observed in the line with the TAURUS II Fabry-Perot interferometer at the William Herschel Telescope in order to study the…
Final-State Interactions in (e,e'p) Reactions with Polarized Nuclei
J. E. Amaro, T. W. Donnelly
The cross section for coincidence, quasielastic proton knock-out by electrons from a polarized K39 nucleus is computed in DWIA using an optical potential in describing the wave fun…
Chiral and scale anomalies of non local Dirac operators
E. Ruiz Arriola, L. L. Salcedo
The chiral and scale anomalies of a very general class of non local Dirac operators are computed using the -function definition of the fermionic determinant. For the axial anoma…