2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/191715We present the numerical evidence for fractal threshold behavior in the five dimensional vacuum Einstein equations satisfying the cohomogeneity-two triaxial Bianchi type-IX ansatz. In other words, we show that a flip of the wings of a butterfly may influence the process of the black hole formation.4 pages, 6 figures, minor changesGeneral Relativity and Quantum CosmologyFractal Threshold Behavior in Vacuum Gravitational Collapsetext