Some constructions of formally self-adjoint conformally covariant polydifferential operators

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Issue Date
2022-03-10
Authors
Case, Jeffrey S.
Lin, Yueh-Ju
Yuan, Wei
Advisor
Citation

Case, J. S., Lin, Y.-J., & Yuan, W. (2022, March 10). Some constructions of formally self-adjoint conformally covariant polydifferential operators. Advances in Mathematics. Retrieved April 4, 2022, from https://www.sciencedirect.com/science/article/abs/pii/S0001870822001281?via%3Dihub

Abstract

We introduce the notion of formally self-adjoint conformally covariant polydifferential operators and give some constructions of families of such operators. In one direction, we show that any homogeneous conformally variational scalar Riemannian invariant (CVI) induces one of these operators. In another direction, we use the ambient metric to give alternative constructions of certain operators produced this way, one of which is a formally self-adjoint, fourth-order, conformally covariant tridifferential operator which should be regarded as the simplest fully nonlinear analogue of the Paneitz operator.

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