2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/225999The string, MSSM GUT, weak and QCD scales, and the Rydberg constant, correspond to the positions of AdS domain wall intersections in a two-dimensional extra space of infinite extent. The domain walls lie along and parallel to the sides of cells which tile the extra space. The cells are four-sided with parallel opposite sides of lengths Rln(pi/2) and Rln(pi), where R is the AdS radius of curvature. Particle masses correspond to the positions of domain walls. We represent the extra space graphically.12 pages, including 6 figures; figure references corrected, minor modifications to text of section 3; atomic nuclei incorporated, 3 figures addedGeneral Physicstext