2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/24692The basic properties of conducting electrons in carbon nanotubes are reviewed from a theoretical perspective, and studies performed on persistent currents in toroidal carbon nanotubes and on the local energy gap in deformed nanotubes are reported on.7 pages, 5 figs, invited talk at the 28th International Conference of Theoretical Physics, Electron Correlations in Nano and Macrosystems, Sep 2004, PolandMesoscale and Nanoscale PhysicsMaterials Sciencetext