2 citations · 3 across the 4 of their papers we have counts for
5 papers
Implicit equations of non-degenerate rational Bezier quadric triangles
A. Canton, L. Fernandez-Jambrina, E. Rosado Maria +1
In this paper we review the derivation of implicit equations for non-degenerate quadric patches in rational Bezier triangular form. These are the case of Steiner surfaces of degree…
Second-order Lagrangians admitting a first-order Hamiltonian formalism
E. Rosado María, J. Muñoz Masqué
Second-order Lagrangian densities admitting a first-order Hamiltonian formalism are studied; namely, i) for each second-order Lagrangian density on an arbitrary fibred manifold $p\…
Geometric elements and classification of quadrics in rational Bézier form
A. Cantón, L. Fernández-Jambrina, M. E. Rosado María +1
In this paper we classify and derive closed formulas for geometric elements of quadrics in rational Bézier triangular form (such as the center, the conic at infinity, the vertex an…
Four-dimensional naturally reductive pseudo-Riemannian spaces
Wafaa Batat, Marco Castrillon Lopez, Eugenia Rosado Maria
The classification of 4-dimensional naturally reductive pseudo-Riemannian spaces is given. This classification comprises symmetric spaces, the product of 3-dimensional naturally re…
First-order equivalent to Einstein-Hilbert Lagrangian
Marco Castrillon Lopez, Jaime Munoz Masque, Eugenia Rosado Maria
A first-order Lagrangian variationally equivalent to the second-order Einstein-Hilbert Lagrangian is introduced. Such a Lagrangian depends on a symmetric linear connect…