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193 papers · 1 filter
Global boundedness of the gradient for a class of nonlinear elliptic systems
Andrea Cianchi, Vladimir Maz'ya
Gradient boundedness up to the boundary for solutions to Dirichlet and Neumann problems for elliptic systems with Uhlenbeck type structure is established. Nonlinearities of possibl…
Covariant Lyapunov vectors
Francesco Ginelli, Hugues Chate', Roberto Livi +1
The recent years have witnessed a growing interest for covariant Lyapunov vectors (CLVs) which span local intrinsic directions in the phase space of chaotic systems. Here we review…
Magnetic cryocooling with Gd3+ centers in a light and compact framework
G. Lorusso, J. W. Sharples, E. Palacios +8
The magnetocaloric effect of gadolinium formate, Gd(OOCH)3, is experimentally determined down to sub-Kelvin temperatures by direct and indirect methods. This 3D metal-organic frame…
Proton temperature anisotropy and magnetic reconnection in the solar wind: effects of kinetic instabilities on current sheet stability
Lorenzo Matteini, Simone Landi, Marco Velli +1
We investigate the role of kinetic instabilities driven by a proton anisotropy on the onset of magnetic reconnection by means of 2-D hybrid simulations. The collisionless tearing o…
Optimal transport and von Neumann entropy in an Heisenberg XXZ chain out of equilibrium
Mario Salerno, Vladislav Popkov
In this paper we investigate the spin currents and the von Neumann entropy (VNE) of an Heisenberg XXZ chain in contact with twisted XY-boundary magnetic reservoirs by means of the…
Training Support Vector Machines Using Frank-Wolfe Optimization Methods
Emanuele Frandi, Ricardo Nanculef, Maria Grazia Gasparo +2
Training a Support Vector Machine (SVM) requires the solution of a quadratic programming problem (QP) whose computational complexity becomes prohibitively expensive for large scale…