The main objective of this short note is to give a sufficient condition for a non constant function k to be Q curvature candidate for a conformal metric on a closed Riemannian manifold with the null Q-curvature. In contrast to the prescribed scalar curvature on the two-dimensional flat tori, the condition we provided is not necessary as some examples show.
机构:
Chinese Univ Hong Kong, Dept Math & Inst Math Sci, Hong Kong, Peoples R ChinaChinese Univ Hong Kong, Dept Math & Inst Math Sci, Hong Kong, Peoples R China