Renormalized characteristic forms of the Cheng--Yau metric and global CR invariants

TL;DR

This paper develops new global CR invariants using renormalized characteristic forms of the Cheng--Yau metric, generalizing previous invariants like the total Q'-curvature and introducing a new invariant for higher degrees.

Contribution

It constructs a family of CR invariants from invariant polynomials via the Cheng--Yau metric, extending known invariants and introducing a new pseudo-hermitian invariant for higher degrees.

Findings

Constructed global CR invariants from invariant polynomials.

Showed the invariants generalize total Q'-curvature.

Introduced a new pseudo-hermitian invariant $ ext{I}'_ ext{Phi}$.

Abstract

For each invariant polynomial $\Phi$, we construct a global CR invariant via the renormalized characteristic form of the Cheng--Yau metric on a strictly pseudoconvex domain. When the degree of $\Phi$ is 0, the invariant agrees with the total $Q'$-curvature. When the degree is equal to the CR dimension, we construct a primed pseudo-hermitian invariant $\mathcal{I}'_\Phi$ which integrates to the corresponding CR invariant. These are generalizations of the $\mathcal{I}'$-curvature on CR five-manifolds, introduced by Case--Gover.