Theoretical aspects Aspectos teóricos 7 Bibliotecología y Ciencia de la Información 4 Chemical descriptors 4 Convexity properties 4 Density matrix 4 Many electron 4 Molecular systems 4 Number of electrons 4 Physical chemistry 4 Physics 4 Quantum theory 4 Library and Information Science 3 2D coordinates 2 Argentina 2 Bibliotecología 2 Computational geometry 2 Data dependent 2 Data dependent triangulations 2 Data-dependent triangulations 2 Delau-nay triangulations 2 Delaunay triangulation 2 Geographic information systems 2 Higher-order delaunay triangulations 2 Information systems 2 Librarianship 2 Surveying 2 Terrain surfaces 2 Tinning 2 Triangulated irregular networks 2