2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/67388The minimal degeneration singularities in the affine Grassmannians of simple simply-laced algebraic groups are determined to be either Kleinian singularities of type A, or closures of minimal orbits in nilpotent cones. The singularities for non-simply-laced types are studied by intersection cohomology and equivariant Chow group methods.12 pages, latexAlgebraic GeometryRepresentation Theorytext