English

The Futaki invariant and the Mabuchi energy of a complete intersection

Differential Geometry 2007-05-23 v1 Algebraic Geometry

Abstract

We study the Futaki invariant and the Mabuchi K-energy of a K\"ahler manifold MM using the Deligne pairing technique developed in earlier papers. We first prove a rather simple characterization of the Futaki character: The Futaki character on a Q-Fano variety is the eigenvalue of the action of Aut(M)Aut(M) on Chow(M)Chow(M), the Chow point of MM. We use this to give a new proof of Lu's theorem on the Futaki invariant of a complete intersection. In the last theorem, we prove a non-linear generalization of Lu's formula which expresses the K-energy of a smooth complete intersection as a singular norm on the space of defining polynomials.

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Cite

@article{arxiv.math/0312529,
  title  = {The Futaki invariant and the Mabuchi energy of a complete intersection},
  author = {D. H. Phong and Jacob Sturm},
  journal= {arXiv preprint arXiv:math/0312529},
  year   = {2007}
}

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21 pages