2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221626We provide a detailed analysis of the doubly spinning black ring, investigating both its general properties and its shape. We also examine the geometry of the ergosurface, illustrating the process of self-merging and discussing the physics of ergoregions.15 pages, 9 figuresGeneral Relativity and Quantum Cosmologytext