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16 papers · 1 filter
Peripheric Extended Twists
Vladimir Lyakhovsky, Mariano A. del Olmo
The properties of the set L of extended jordanian twists are studied. It is shown that the boundaries of L contain twists whose characteristics differ considerably from those of in…
Ab-initio structural, elastic, and vibrational properties of carbon nanotubes
D. Sanchez-Portal, E. Artacho, J. M. Soler +2
A study based on ab initio calculations is presented on the estructural, elastic, and vibrational properties of single-wall carbon nanotubes with different radii and chiralities. W…
Elastic Properties of Single-Wall Nanotubes
E. Hernandez, C. Goze, P. Bernier +1
We report results of theoretical studies on the elastic properties of single-wall nanotubes of the following compositions: C, BN, , and . These stud…
The family of quaternionic quasi-unitary Lie algebras and their central extensions
Francisco J. Herranz, Mariano Santander
The family of quaternionic quasi-unitary (or quaternionic unitary Cayley--Klein algebras) is described in a unified setting. This family includes the simple algebras sp(N+1) and sp…
Superconformal mechanics, black holes, and non-linear realizations
J. A. de Azcarraga, J. M. Izquierdo, J. C. Perez Bueno +1
The OSp(2|2)-invariant planar dynamics of a D=4 superparticle near the horizon of a large mass extreme black hole is described by an N=2 superconformal mechanics, with the SO(2) ch…
Pseudo-orthogonal groups and integrable dynamical systems in two dimensions
J. A. Calzada, M. A. del Olmo, M. A. Rodriguez
Integrable systems in low dimensions, constructed through the symmetry reduction method, are studied using phase portrait and variable separation techniques. In particular, invaria…