2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/109143There exist very twisting families of lines on Grassmannians and isotropic Grassmannians. This is a key step in proving existence of a rational section of a family of isotropic Grassmannians over a surface with vanishing Brauer obstruction.25 pages, posting of older preprintAlgebraic Geometry14C05; 14M15Very twisting families of pointed lines on Grassmannianstext