Haitian Yang杨海天

Applied mathematics

Haitian Yang 杨海天

I am currently a postdoctoral researcher at IRMAR, Université de Rennes, France, in the project of Prof. L. Miguel Rodrigues. I received my Ph.D. in Applied Mathematics from Tsinghua University in 2026, under the supervision of Prof. Wen-An Yong, and my bachelor’s degree in Mathematics and Economics from Tsinghua University in 2021.

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Research

I work in applied mathematics, and my interest lies in using mathematics to understand systems arising in physics, engineering, economics and computing, and to control them. During my Ph.D., I extended Prof. G. Bastin and Prof. J.-M. Coron’s boundary control theory for one-dimensional first-order hyperbolic systems to several space dimensions, covering boundary stabilization, boundary controllability and boundary optimal control. These results apply in particular to the Saint-Venant equations, which describe water flow in rivers and coastal seas.

Nomen est omen: my given name, Haitian, means “sea and sky”, so I spend my time studying the sea. From the open ocean to the beach, water waves are described by different equations. Seen from above: swell refracts across the shelf and breaks on the beach, and dashed depth contours mark where each model applies. Hover over a zone, or tap it, to see the model and my work.
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Publications

2026

  1. [6]

    Boundary stabilization of multi-dimensional first-order quasilinear hyperbolic systems

    H. Yang

    Preprint, arXiv:2610.13577

    StabilizationPreprintarXiv

  2. [5]

    Exponential turnpike in optimal boundary control of multi-dimensional first-order hyperbolic systems

    H. Yang

    Preprint, arXiv:2609.14601

    Optimal controlPreprintarXiv

  3. [4]

    Exact controllability for stochastic first-order multi-dimensional hyperbolic systems

    Z. Li, Q. Lü, Y. Wang, H. Yang

    SIAM Journal on Control and Optimization, accepted

    ControllabilityJournalarXiv

  4. [3]

    Numerical boundary control of multi-dimensional discrete-velocity kinetic models

    H. Yang, W.-A. Yong

    Systems & Control Letters 217 (2026), 106561

    StabilizationJournalarXiv

2025

  1. [2]

    Boundary control of multi-dimensional discrete-velocity kinetic models

    H. Yang, W.-A. Yong

    IEEE Transactions on Automatic Control (2025)

    StabilizationJournalarXivIEEE Xplore

2024

  1. [1]

    Feedback boundary control of multi-dimensional hyperbolic systems with relaxation

    H. Yang, W.-A. Yong

    Automatica 167 (2024), 111791

    StabilizationJournalarXivScienceDirect

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Talks

  • Recent Developments in Boundary Stabilization of the Two-dimensional Saint-Venant Equations
  • Sep 2026ShanghaiTech University, Shanghai, ChinaManuel Rissel, Zhuo Xu
  • Boundary Control of Multi-dimensional First-order Hyperbolic Systems
  • Apr 9, 2026École des Ponts ParisTech, Paris, FranceAmaury Hayat
  • Mar 24, 2026Bergische Universität Wuppertal, GermanyBirgit Jacob
  • Feb 24, 2026FEMTO-ST, Besançon, FranceYann Le Gorrec, Yongxin Wu
  • Feb 19, 2026IRMAR, Rennes, FranceL. Miguel Rodrigues
  • Feb 17, 2026Institut de Mathématiques de Toulouse, FranceTimothée Crin-Barat
  • Feb 4, 2026Chair of Applied Mathematics, Stuttgart, GermanyChristian Rohde
  • Jan 14, 2026IGPM, Aachen, GermanyMichael Herty
  • Nov 2025FAU DCN-AvH, Erlangen and Speinshart, GermanyEnrique Zuazua
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Teaching

  • Teaching assistant, Tsinghua University2021 – 2025 · Per course: 32 hours of exercise sessions, in addition to office hours and grading
  • Fall 2021Calculus IOutstanding Teaching Assistant Award (inaugural, university-level)Ping Yan
  • Spring 2022Partial Differential Equations IWen-An Yong
  • Fall 2022Ordinary Differential EquationsSi-Qi Liu
  • Spring 2023Analysis IIWenjia Jing
  • Fall 2023Partial Differential Equations IIYang Lan
  • Spring 2024Differential Geometry and Smooth ManifoldsOutstanding Teaching Assistant AwardHonghao Gao
  • Fall 2024Complex AnalysisSebastian Heller
  • Spring 2025TopologyHonghao Gao
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Curriculum vitae

Positions

  • CurrentPostdoctoral researcher, IRMAR, Université de Rennes, FranceIn the project of Prof. L. Miguel Rodrigues.
  • 2025 – 2026Visiting Ph.D. student, FAU DCN-AvH, Erlangen, GermanyHosted by Prof. Enrique Zuazua, Nov 2025 – Apr 2026

Education

  • 2021 – 2026Ph.D. in Applied Mathematics, Tsinghua UniversityAdvisor: Prof. Wen-An Yong.
  • 2017 – 2021B.S. in Mathematics and Economics (double major), Tsinghua University
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Contact

Email

[email protected]

IRMAR, Université de Rennes, France