Bi-interpretation in weak set theories Dahkki Freire, AR, Hamkins, JD

The exact strength of the class forcing theorem Dahkki Gitman, V, Hamkins, JD, Holy, P, Schlicht, P, Williams, KJ

Inter-model reflection principles Dahkki Barton, N, Caicedo, AE, Fuchs, G, Hamkins, JD, Reitz, J, Schindler, R