Nontrivial automorphisms of $\mathcal P(ω)/\mathrm{Fin}$ in Cohen models — Quantapedia

We show that if $κ< \aleph_ω$ Cohen reals are added to a model of $\mathsf{CH}$, then there are nontrivial automorphisms of $\mathcal P(ω)/\mathrm{Fin}$ in the extension. Under some further hypothe