A Quartic Conformally Covariant Differential Operator for Arbitrary Pseudo-Riemannian Manifolds (Summary)

Abstract

This is the original manuscript dated March 9th 1983, typeset by the Editors for the Proceedings of the Midwest Geometry Conference 2007 held in memory of Thomas Branson. Stephen Paneitz passed away on September 1st 1983 while attending a conference in Clausthal and the manuscript was never published. For more than 20 years these few pages were circulated informally. In November 2004, as a service to the mathematical community, Tom Branson added a scan of the manuscript to his website. Here we make it available more formally. It is surely one of the most cited unpublished articles. The differential operator defined in this article plays a key role in conformal differential geometry in dimension 4 and is now known as the Paneitz operator.

This is a contribution to the Proceedings of the 2007 Midwest Geometry Conference in honor of Thomas P. Branson, published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/

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• Logarithmic singularities of Schwartz kernels and local invariants of conformal and CR structures
• Q-Curvature, Spectral Invariants, and Representation Theory
• Integral pinched 3-manifolds are space forms
• Curvature flows on four manifolds with boundary
• Some Conformal Invariants from the Noncommutative Residue for Manifolds with Boundary
• On the second Paneitz-Branson invariant
• Connected sums of closed Riemannian manifolds and fourth order conformal invariants