2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/52537We define the notion of A-model Lagrangian D-branes as introducing defects in the Calabi-Yau crystal. The crystal melting in the presence of these defects reproduces all genus string amplitudes as well as leads to additional non-perturbative terms.27 pages, 15 figures, latexHigh Energy Physics - Theorytext