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Lie subalgebras of the matrix quantum pseudodifferential operators
(2016)
We give a complete description of the anti-involutions that preserve the principal gradation of the algebra of matrix quantum pseudodifferential operators and we describe the Lie subalgebras of their minus fixed points.
Maximal totally geodesic submanifolds and index of symmetric spaces
(2016)
Let M be an irreducible Riemannian symmetric space. The index i(M ) of M is the minimal codimension of a totally geodesic submanifold of M. In [1] we proved that i(M ) is bounded from below by the rank rk(M) of M, that is, ...
Aportes a la formación del profesorado constructivista : resultados en dos países
(2016)
La investigación aborda la influencia que tiene la participación en la investigación educativa en la calidad de la enseñanza de docentes de ciencias experimentales de Argentina y España. Se han utilizado tres vías de acceso ...
Matrix Gegenbauer polynomials : the 2×2 fundamental cases
(2016)
In this paper, we exhibit explicitly a sequence of 2 × 2 matrix valued orthogonal polynomials
with respect to a weight W p,n , for any pair of real numbers p and n such that 0 < p < n. The entries of these polynomiales ...
Center of mass and spin for isolated sources of gravitational radiation
(2016)
We define the center of mass and spin of an isolated system in general relativity. The resulting relationships between these variables and the total linear and angular momentum of the gravitational system are remarkably ...