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75 papers · 1 filter
estimates for overdetermined Radon transforms
Luca Brandolini, Allan Greenleaf, Giancarlo Travaglini
We prove several variations on the results of Ricci and Travaglini concerning bounds for convolution with all rotations of a measure supported by a fixed convex curve in the plane.…
A variational problem for the spatial segregation of reaction--diffusion systems
Monica Conti, Susanna Terracini, Gianmaria Verzini
In this paper we study a class of stationary states for reaction--diffusion systems of densities having disjoint supports. For a class of segregation states governed by a…
Twisted-mass lattice QCD with mass non-degenerate quarks
R. Frezzotti, G. C. Rossi
The maximally twisted lattice QCD action of an doublet of mass degenerate Wilson quarks gives rise to a real positive fermion determinant and it is invariant under the pr…
An extragalactic HII region in the Virgo cluster
L. Cortese, G. Gavazzi, A. Boselli +1
We present spectroscopic observations for six emission-line objects projected onto the Virgo cluster. These sources have been selected from narrow band (Hα+[NII]) images showing fa…
Constraining the reionization history with large angle CMB polarization
Loris PL Colombo
The first-year WMAP data release showed that the reionization optical depth to CMB photons is greater than previously thought. This follows from unexpectedly high values of the C^T…
The Gravitational Suppression Hypothesis: Dynamical Analysis in the Small Velocity Regime
Christian Marinoni, Federico Piazza
In a previous paper we have proposed a non--Newtonian, phenomenological description of the effective gravitational force acting between exotic dark matter and baryons, which was sh…