English

Expected centre of mass of the random Kodaira embedding

Differential Geometry 2022-04-25 v3 Algebraic Geometry Probability

Abstract

Let XPN1X \subset \mathbb{P}^{N-1} be a smooth projective variety. To each gSL(N,C)g \in SL (N , \mathbb{C}) which induces the embedding gXPN1g \cdot X \subset \mathbb{P}^{N-1} given by the ambient linear action we can associate a matrix μˉX(g)\bar{\mu}_X (g) called the centre of mass, which depends nonlinearly on gg. With respect to the probability measure on SL(N,C)SL (N , \mathbb{C}) induced by the Haar measure and the Gaussian unitary ensemble, we prove that the expectation of the centre of mass is a constant multiple of the identity matrix for any smooth projective variety.

Keywords

Cite

@article{arxiv.2009.06201,
  title  = {Expected centre of mass of the random Kodaira embedding},
  author = {Yoshinori Hashimoto},
  journal= {arXiv preprint arXiv:2009.06201},
  year   = {2022}
}

Comments

v2: 18 pages, minor corrections. v3: 14 pages, corrected proof, final version