4 problems

Extension principle. An extension principle analogous to the one formulated by Mihalík should hold in the non-trapped region.

In Bianchi IX quantum cosmology, let $\alpha$, $\beta_+$, and $\beta_-$ be the Misner variables, with $\alpha$ fixed, and let $\psi$ be a Wheeler–DeWitt wave function. At each poin…

The diagonal and nondiagonal Bianchi IX models near the cosmological singularity have different topological structures in their spaces of critical points. In both cases these criti…

The Bianchi IX model near the cosmological singularity has diagonal and nondiagonal cases, whose dynamics can be studied through their spaces of critical points. In the diagonal ca…