In recent published papers we presented the Extreme Vertices Model (EVM), a concise and complete model for representing orthogonal polyhedra and pseudo-polyhedra (OPP). This model exploits the simplicity of its domain ...

Con el cierre de las escuelas por la crisis del Covid-19, todas las clases se convirtieron súbitamente en e-learning. Toda la población europea quedó confinada, los estudiantes de intercambio volvieron a casa y los españoles ...

This paper contains a result of Cantor-Bernstein type concerning archiemedean lattice ordered groups.

We consider quadrangulations of red and blue points in the plane where each face is convex and no edge connects two points of the same color. In particular, we show that the following problem is NP-hard: Given a finite set ...

In [GMPS] we proved that the moment map image of a b-symplectic toric manifold is a convex b-polytope. In this paper we obtain convexity results for the more general case of non-toric hamiltonian torus actions on b-symplectic ...