A counterexample to Tian's Stabilization Conjecture

Abstract

It was conjectured by Tian that the global log canonical threshold (known as the $\alpha$-invariant) is equal to the level $k$ log canonical threshold (known as the ${\alpha }_k$-invariant) for all sufficiently large $k$. A weaker folklore conjecture has been that the invariants ${\alpha }_k$ are eventually monotone. We provide a counterexample to both conjectures.