2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63058In this text, We compute the equivariant cohomology of Bott-Samelson varieties. Thanks to this computation, we give a new demonstration for the formulas proved by Sarah Billey for the equivariant cohomology of Schubert varieties.6 pagesGroup Theory20G10text