2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/75973Let MS_2 be the p-primary second Morava stabilizer group, C a supersingular elliptic curve over \br{FF}_p, O the ring of endomorphisms of C, and \ell a topological generator of Z_p^x (respectively Z_2^x/{+-1} if p = 2). We show that for p > 2 the group Γ\subseteq O[1/\ell]^x of quasi-endomorphisms of degree a power of \ell is dense in MS_2. For p = 2, we show that Γis dense in an index 2 subgroup of MS_2.16 pages, to appear in J. Pure Appl. AlgAlgebraic Topology11R52; 14H52, 55Q51text