2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/189790I review recent progress in defining a probability measure in the inflationary multiverse. General requirements for a satisfactory measure are formulated and recent proposals for the measure are clarified and discussed.13 pages, 1 figure. Discussion of eternal observers is slightly expandedHigh Energy Physics - TheoryAstrophysicsGeneral Relativity and Quantum Cosmologytext