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    Deformations of Q-curvature II

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    Preprint (293.7Kb)
    Date
    2022-02-11
    Author
    Lin, Yueh-Ju
    Yuan, Wei
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    Citation
    Lin, YJ., Yuan, W. Deformations of Q-curvature II. Calc. Var. 61, 74 (2022). https://doi.org/10.1007/s00526-021-02181-5
    Abstract
    This is the second article of a sequence of research on deformations of Q-curvature. In the previous one, we studied local stability and rigidity phenomena of Q-curvature. In this article, we mainly investigate the volume comparison with respect to Q-curvature. In particular, we show that volume comparison theorem holds for metrics close to strictly stable positive Einstein metrics. This result shows that Q-curvature can still control the volume of manifolds under certain conditions, which provides a fundamental geometric characterization of Q-curvature. Applying the same technique, we derive the local rigidity of strictly stable Ricci-flat manifolds with respect to Q-curvature, which shows the non-existence of metrics with positive Q-curvature near the reference metric.
    Description
    Click on the DOI to access this article from publisher. Preprint version available.
    URI
    https://doi.org/10.1007/s00526-021-02181-5
    https://soar.wichita.edu/handle/10057/22842
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