2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69566We show that for Bruhat intervals starting from the origin in simply-laced Coxeter groups the conjecture of Lusztig and Dyer holds, that is, the R-polynomials and the Kazhdan-Lusztig polynomials defined on [e,u] only depend on the isomorphism type of [e,u].28 pages 0 figuresCombinatorics06A07text