2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/74283In the 2-local stable homotopy category the group of left-bu-module automorphisms of bu\wedge bo which induce the identity on mod 2 homology is isomorphic to the group of infinite upper triangular matrices with entries in the 2-adic integers. We identify the conjugacy class of the matrix corresponding to 1\wedgeψ^3, where ψ^3 is the Adams operation.26 pagesAlgebraic Topology55S25 (Primary) 55P42 (Secondary)text