Stability (learning theory)

Moduli

Physics

Metric (unit)

Pure mathematics

Dimension (graph theory)

Mathematics

Moduli space

Operating system

Gravitational singularity

Machine learning

Mathematical analysis

Economics

Operations management

Space (punctuation)

Computer science

Quantum mechanics

Duke Mathematical Journal

We prove the K-moduli space of cubic threefolds is identical to their GIT moduli. More precisely, the K-(semi,poly)-stability of cubic threefolds coincide to the corresponding GIT stabilities, which could be explicitly calculated. In particular, this implies that all smooth cubic threefolds admit K\"ahler-Einstein metric as well as provides a precise list of singular KE ones. To achieve this, our main new contribution is an estimate in dimension three of the volumes of kawamata log terminal singularities introduced by Chi Li. This is obtained via a detailed study of the classification of three dimensional canonical and terminal singularities, which was established during the study of the explicit three dimensional minimal model program.

K-stability of cubic threefolds