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10 papers · 1 filter
On local generators of affine distributions on Riemannian manifolds
Razvan M. Tudoran
Using a coordinate free characterization of hyperplanes intersection, we provide explicitly a set of local generators for a smooth affine distribution given by those smooth vector…
Quantum Peierls stress of straight and kinked dislocations and effect of non-glide stresses
B. Barvinschi, L. Proville, D. Rodney
It was recently shown that to predict reliable Peierls stresses from atomistic simulations, one has to correct the Peierls barrier by the zero-point energy difference between the i…
Unitary Representations of Quantum Superpositions of two Coherent States and beyond
Antonino Messina, Gheorghe Draganescu
The construction of a class of unitary operators generating linear superpositions of generalized coherent states from the ground state of a quantum harmonic oscillator is reported.…
A note on power instability of linear discrete-time systems in Banach spaces
Ioan-Lucian Popa
In this paper we investigate the power instability properties and give necessary and sufficient conditions for the concepts of uniform power instability, power instability and stro…
On exponential stability for linear discrete-time systems in Banach spaces
Ioan-Lucian Popa, Traian Ceausu, Mihail Megan
In this paper we investigate four concepts of exponential stability for difference equations in Banach spaces. Characterizations of these concepts are given. They can be considered…
Discrete symmetries determining scalar quantum modes on the de Sitter spacetime
Ion I. Cotaescu, Gabriel Pascu
The action of the discrete symmetries on the scalar mode functions of the de Sitter spacetime is studied. The invariance with respect to a combination of discrete symmetries is put…