activity
20242026
most citedOn the distribution of non-rigid families in the moduli spaces

1 citations · 1 across the 5 of their papers we have counts for

collaborators

11 papers

math.AG2026

Quantitative finiteness for maximal complex totally geodesic submanifolds of non-arithmetic ball quotients

Tianzhi Hu, Runze Zhang

We prove that the number of maximal complex totally geodesic submanifolds of a smooth finite-volume non-arithmetic ball quotient is bounded linearly by its volume, with a constant…

math.CV2026

Rigidity for proper holomorphic ball maps with degenerate CR Gauss map

Tianzhi Hu, Wanke Yin, Pingsan Yuan

Let and be integers with , and let be a proper holomorphic map that admits a -smooth extension to the boundary. We pro…

math.AG2026

Simpson's closedness conjecture in arbitrary rank

Tianzhi Hu

For a compact Riemann surface , Simpson associated to each stable graded Higgs bundle a locus , consisting of flat bundles th…

math.DG2026

Pointwise energy monotonicity for stable Higgs bundles

Tianzhi Hu

We study the Dai--Li conjecture concerning the pointwise monotonicity of the energy density along the -flow of stable Higgs bundles. We prov…

math.AG2026

On the algebraicity of non-abelian Noether-Lefschetz loci of rank-two real local systems

Tianzhi Hu, Kang Zuo

As a non-abelian analogue of the Hodge locus, Simpson introduced the non-abelian Noether--Lefschetz locus and conjectured its algebraicity for PVHS. In this paper, we st…

math.CV2026

Sharp degree bound for rational proper maps from to

Tianzhi Hu, Mai Shi, Pingsan Yuan

We prove that every rational proper holomorphic map from to has degree at most , confirming D'Angelo's conjecture in this case. This sharp bound fo…

math.AG2026

Isomonodromic deformations of Higgs bundles and characterization of the non-abelian Noether--Lefschetz locus

Tianzhi Hu, Ruiran Sun, Jinbang Yang +1

Let be a smooth proper family of smooth projective varieties. An irreducible complex local system on a fiber admits an isomonodromic deformation, hence determines a holo…

math.AG2026

Higher order isomonodromic deformation of Higgs bundles and a characterization of the non-abelian Noether-Lefschetz locus

Tianzhi Hu, Ruiran Sun, Jinbang Yang +1

The purpose of this paper is to establish a local theory of the non-abelian Noether--Lefschetz locus. Given a family of projective manifolds over a complex variety , the isomono…

math.AG2025

Non-Abelian Kodaira-Spencer Map and non-existence of holomorphic isomonodromic deformation of Higgs bundles over Teichmüller spaces

Tianzhi Hu, Ruiran Sun, Kang Zuo

We define the isomonodromic deformation of a Higgs bundle on a compact Riemann surface via the Hitchin--Simpson correspondence and the isomonodromic deformation of the associated l…

math.AG2025

Kodaira-Spencer Map on the Hitchin-Simpson Correspondence

Tianzhi Hu, Ruiran Sun, Kang Zuo

We define the isomonodromic deformation of a Higgs bundle over a compact Riemann surface via the Hitchin-Simpson correspondence and the isomonodromic deformation of a local system.…

math.AG2024★ 1 cited

On the distribution of non-rigid families in the moduli spaces

Ke Chen, Tianzhi Hu, Ruiran Sun +1

This paper investigates the distribution of non-rigid families in a moduli space of polarized projective manifolds for which the infinitesimal Torelli theorem holds.…