title: Codimension-two critical behavior in vacuum gravitational collapse.
abstract: We consider the critical behavior at the threshold of black-hole formation for the five-dimensional vacuum Einstein equations satisfying the cohomogeneity-two triaxial Bianchi type-IX ansatz. Exploiting a discrete symmetry present in this model we predict the existence of a codimension-two attractor. This prediction is confirmed numerically and the codimension-two attractor is identified as a discretely self-similar solution with two unstable modes.
authors.affiliation: M. Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Bizoń
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Chmaj
authors.forename: Bernd G
authors.initials: BG
authors.lastname: Schmidt