Kleinian

Prove that if a Kleinian group G does not contain parabolic elements and is isomorphic to the fundamental group of a closed orientable surface, then G is either quasi-Fuchsian or degenerate […]

The second three months of life, the critical era in the Kleinian narrative, are marked by a shift from the paranoid to the "depressive" position produced by the infant's growing ability to integrate contradictory perceptions.