2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/101264We study birational transformations into elliptic fibrations and birational automorphisms of quasismooth anticanonically embedded weighted Fano 3-fold hypersurfaces having terminal singularities classified by A.R. Iano-Fletcher, J. Johnson, J. Kollar, and M. Reid.29 pages. The title has been changed. The section on degree of irrationality is removed. The contents are rearranged. The cases N=60 and 36 are reconsidered. Revised a lotAlgebraic GeometryNumber Theory11G05; 11G35; 14E07; 14G05; 14J28; 14J45text