2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81556We show that nuclear states lying at the edge of stability may show enormously enhanced response to small perturbations. For example, a 0.1% change in the strength of the strong nucleon-nucleon interaction can cause almost a hundred times bigger change in the resonance energy of the 0+_2 state of 12C.3 pages with 3 figures. The postscript file and more information are available at http://matrix.elte.hu/~csotoNuclear TheoryAstrophysicsHigh Energy Physics - PhenomenologyQuantum Physicstext