activity
20182026
most citedPhysical-space estimates for axisymmetric waves on extremal Kerr spacetime

1 citations · 1 across the 22 of their papers we have counts for

collaborators

22 papers

math.DG2026

Small Normal Curvature and Three-Manifold Topology

Tsz-Kiu Aaron Chow, Jingbo Wan

For , we prove that every smooth immersion satisfies , with equality only for the V…

math.DG2026

Scalar Curvature Flexibility in the Riemannian Burnett Compactness Class

Jingbo Wan

Let be a connected smooth -manifold without boundary, where , and let , with if is open. We prove that every smooth Riemannian metric $g…

math.DG2026

Rigidity of positive mass theorem with fast metric decay

Jianchun Chu, Man-Chun Lee, Jingbo Wan

In this work, we consider metrics on Euclidean space with nonnegative scalar curvature and rapid decay at infinity. We show that, in dimensions four and higher, any such metric is…

math.DG2026

Maximal Normal Curvature and Veronese Rigidity

Tsz-Kiu Aaron Chow, Jingbo Wan

We prove a sharp Veronese rigidity theorem for closed immersed submanifolds of the Euclidean unit ball under intrinsic harmonic-structure assumptions. For an isometric immersion $F…

math.AP2026

Wave decay and horizon instability on strongly charged extremal Kerr-Newman black holes

Allen Juntao Fang, Elena Giorgi, Jingbo Wan

We prove the first boundedness and pointwise decay result for the scalar wave equation on rotating extremal black holes without any symmetry assumptions. The result applies to slow…

math.DG2026

Sharp focal radius estimate and rigidity of hypersurfaces in manifolds with positive curvature

Tsz-Kiu Aaron Chow, Jingbo Wan

We prove a sharp Clifford-threshold focal-radius estimate and rigidity for immersed hypersurfaces. Under a -form curvature condition, formulated by the Weitzenböck curvature ter…

math.AP2026

Vacuum initial data with minimal decay and borderline decay

Dawei Shen, Jingbo Wan

In this note, we show that the conical solution-operator method of Mao-Tao in [Localized initial data for Einstein equations] applies to a simple construction of vacuum asymptotica…

gr-qc2026

Cauchy Data for Formation of Multiple Black Holes with Prescribed ADM Parameters

Dawei Shen, Jingbo Wan

We give a simple construction of smooth, asymptotically flat vacuum initial data modeling a relativistic collapsing --body system, with independently prescribed ADM energy, line…

gr-qc2025

Cauchy data for multiple collapsing boson stars

Elena Giorgi, Dawei Shen, Jingbo Wan

We construct Cauchy initial data for the Einstein-Maxwell-Klein-Gordon (EMKG) system, which evolves in finite time into spacetimes containing multiple trapped surfaces. From a phys…

gr-qc2025

Einstein-Maxwell Equations on Mass-Centered GCM Hypersurfaces

Allen Juntao Fang, Elena Giorgi, Jingbo Wan

The resolution of the nonlinear stability of black holes as solutions to the Einstein equations relies crucially on imposing the right geometric gauge conditions. In the vacuum cas…

gr-qc2025

Mass-Centered GCM Framework in Perturbations of Kerr(-Newman)

Allen Juntao Fang, Elena Giorgi, Jingbo Wan

The nonlinear stability problem for black hole solutions of the Einstein equations critically depends on choosing an appropriate geometric gauge. In the vacuum setting, the use of…

math.DG2025

Constructing entire minimal graphs by evolving planes

Chung-Jun Tsai, Mao-Pei Tsui, Jingbo Wan +1

We introduce an evolving-plane ansatz for the explicit construction of entire minimal graphs of dimension () and codimension (), for any odd integer .…

gr-qc2025

Formation of multiple Black Holes from Cauchy data

Dawei Shen, Jingbo Wan

We construct a family of asymptotically flat Cauchy initial data for the Einstein vacuum equations that contain no trapped surfaces, yet whose future development admits multiple ca…

math.AP2025

Formation of trapped surfaces for the Einstein--Maxwell--charged scalar field system

Dawei Shen, Jingbo Wan

In this paper, we prove a scale-critical trapped surface formation result for the Einstein--Maxwell--charged scalar field (EMCSF) system, without any symmetry assumptions. Specific…

gr-qc2024

A canonical foliation on null infinity in perturbations of Kerr

Sergiu Klainerman, Dawei Shen, Jingbo Wan

Kerr stability for small angular momentum has been proved in the series of works by Klainerman-Szeftel, Giorgi-Klainerman-Szeftel and Shen. Some of the most basic conclusions of th…

gr-qc2024

Boundedness and Decay for the Teukolsky System in Kerr-Newman Spacetime II: The Case , in Axial Symmetry

Elena Giorgi, Jingbo Wan

We establish boundedness and polynomial decay results for the Teukolsky system in the exterior spacetime of very slowly rotating and strongly charged sub-extremal Kerr-Newman black…

math.DG2024

Sharp Interior Gradient Estimate for Area Decreasing Graphical Mean Curvature Flow in Arbitrary Codimension

Jingbo Wan

We prove the sharp interior gradient estimate for area decreasing graphical mean curvature flow in arbitrary codimension, which generalizes the result in \cite{CM}.

math.DG2023

Rigidity of area non-increasing maps

Man-Chun Lee, Luen-Fai Tam, Jingbo Wan

In this work, we consider the area non-increasing map between manifolds with positive curvature. By exploring the strong maximum principle along the graphical mean curvature flow,…

math.DG2023

Rigidity of contracting map using harmonic map heat flow

Man-Chun Lee, Jingbo Wan

Motivated by a question of Tsai-Tsui-Wang, we consider the rigidity of map from manifolds with positive Ricci curvature to manifolds with positive sectional curvature. We show that…

math.DG2023

Preserving positive intermediate curvature

Tsz-Kiu Aaron Chow, Florian Johne, Jingbo Wan

Consider a compact manifold (with or without boundary) of dimension . Positive -intermediate curvature interpolates between positive Ricci curvature () and positiv…

math.AP2022★ 1 cited

Physical-space estimates for axisymmetric waves on extremal Kerr spacetime

Elena Giorgi, Jingbo Wan

We study axisymmetric solutions to the wave equation on extremal Kerr backgrounds and obtain integrated local energy decay (or Morawetz estimates) through an analysis \textit{exclu…

math.DG2018

Uniqueness Theorems of Self-Conformal Solutions to Inverse Curvature Flows

Nicholas Cheng-Hoong Chin, Frederick Tsz-Ho Fong, Jingbo Wan

It has been known in that round spheres are the only closed homothetic self-similar solutions to the inverse mean curvature flow and parabolic curvature flows by degree -1 homogene…