20 citations · 34 across the 8 of their papers we have counts for
8 papers
Uniqueness of the torsion-curvature pair
Raúl Martínez Bohórquez, José Navarro, Juan B. Sancho
On smooth manifolds of dimension , we prove that the torsion and curvature are, up to a scalar factor, the only pair of a vector-valued 2-form and an endomorphism-valued 2…
Natural operations on differential forms
J. Navarro, J. B. Sancho
We prove that the only natural operations between differential forms are those obtained using linear combinations, the exterior product and the exterior differential. Our result ge…
Peetre-Slovák's theorem revisited
J. Navarro, J. B. Sancho
In 1960, J. Peetre proved the finiteness of the order of linear local operators. Later on, J. Slovák vastly generalized this theorem, proving the finiteness of the order of a broad…
Noether's Second Theorem on natural bundles
Jose Navarro, Juan B. Sancho
Following work by I. Anderson, in this note we present a formulation of Noether's Second Theorem that is valid on any natural bundle.
Energy and electromagnetism of a differential form
J. Navarro, J. B. Sancho
Let X be a smooth manifold of dimension 1+n endowed with a lorentzian metric g, and let T be the electromagnetic energy tensor associated to a 2-form F. In this paper we characteri…
A characterization of the electromagnetic stress-energy tensor
J. Navarro, J. B. Sancho
In a previous paper, we pointed out how a dimensional analysis of the stress-energy tensor of the gravitational field allows to derive the field equation of General Relativity. In…