Does the singularities of black holes not being simply connected imply that the universal coverings of the usual types of Lie groups of quantum field theory fail?
I was downvoted and told that I need to give more detail, so please forgive me if I am being redundant or verbose. Universal coverings require simple connectedness of the spaces they cover by definition. The singularities of black holes (assuming all black holes rotate, and therefore have ring singularities) in the space means it is not simply connected, right? Is there any way around this while keeping the universal coverings?
I'm still not sure why I'm being downvoted. Maybe rewording will help: "Is it impossible to use a universal covering of a Lie group to construct a quantum field theory for gravity, given the ring singularities of rotating black holes?"