English

Siu's analyticity theorem for positive pluriharmonic currents

Complex Variables 2026-06-29 v1 Algebraic Geometry

Abstract

Let TT be a positive \ddc\ddc-closed current of bidimension (1,1)(1,1) on a projective manifold XX of dimension n.n. We show that for every c>0c > 0 the set of points of XX where the Lelong number of TT is larger or equal to cc is an analytic subset of dimension at most 11 of X.X. Moreover, the following Siu decomposition holds T=iIλi[Vi]+T0,T=\sum_{i\in I} \lambda_i[V_i] +T_0, where {Vi}iI\{V_i\}_{i\in I} is a (possibly empty) finite or countable family of compact analytic curves in X,X, λiR+,\lambda_i\in\mathbb{R}^+, and T0T_0 is a positive \ddc\ddc-closed current of bidimension (1,1)(1,1) on XX whose Lelong number vanishes outside a finite or countable set. As a consequence, the cohomology class of every positive \ddc\ddc-closed current of bidimension (1,1)(1, 1) on X,X, which does not give mass to any proper analytic set, belongs to the Poincar\'e dual of the effective cone of H1,1(X,R).H^{1,1}(X,\mathbb{R}).

Cite

@article{arxiv.2606.29680,
  title  = {Siu's analyticity theorem for positive pluriharmonic currents},
  author = {Tien-Cuong Dinh and Viet-Anh Nguyen},
  journal= {arXiv preprint arXiv:2606.29680},
  year   = {2026}
}

Comments

40 pages

R2 v1 2026-07-22T20:14:38.146Z