Sven Hirsch
Sven Hirsch

I am a Ritt Assistant Professor at Columbia University working on geometric analysis and mathematical relativity. In particular, my research focuses on the mathematics of black holes and gravitational waves. Previously, I was a member at the Institute for Advanced Study in Princeton, and in 2023 I obtained a PhD from Duke working with Hubert Bray. There I won the L.P. Smith Award for Teaching Excellence and the Rudin Prize for Outstanding PhD Dissertations.

Outside of math I enjoy climbing, surfing, and mountaineering.

News: In May 2026, I will give a lecture series at Tsinghua and BIMSA. In August 2026, I will teach a minicourse on spinors and gravitational waves at the University of Padova.

Contact: sven.hirsch@columbia.edu

Publications

  1. Stable 2-systoles, scalar curvature and spin^c comass bounds, joint with Simone Cecchini and Rudolf Zeidler, 2026, arXiv
  2. On a Variant of the Penrose Conjecture, joint with Yipeng Wang, 2026, arXiv
  3. The Hyperboloidal and Spacetime Positive Mass Theorem in all dimensions, joint with Marcus Khuri, Martin Lesourd and Yiyue Zhang, 2026, arXiv
  4. The Spacetime Positive Mass Theorem with Multiple Time Dimensions, joint with Alec Payne and Yiyue Zhang, 2026, arXiv
  5. The lock principle for scalar curvature, joint with Georg Frenck and Bernhard Hanke, 2026, arXiv
  6. Surgery and total mean curvature, joint with Georg Frenck and Bernhard Hanke, 2026, arXiv
  7. A universal Bochner formula for scalar curvature, 2026, arXiv
  8. Causal character of imaginary Killing spinors and spinorial slicings, joint with Yiyue Zhang, 2025, arXiv
  9. Monotonicity of Causal Killing Vectors and Geometry of ADM Mass Minimizers, joint with Lan-Hsuan Huang, 2025, arXiv
  10. Rigidity of Asymptotically Hyperboloidal Initial Data Sets with Vanishing Mass, joint with Hyun Chul Jang and Yiyue Zhang, 2025, Comm. Math. Phys., arXiv
  11. Rigidity of spin fill-ins with non-negative scalar curvature, joint with Simone Cecchini and Rudolf Zeidler, 2024, arXiv
  12. Initial data sets with vanishing mass are contained in pp-wave spacetimes, joint with Yiyue Zhang, 2025, J. Eur. Math. Soc., arXiv
  13. Stability of Llarull’s theorem in all dimensions, joint with Yiyue Zhang, 2024, Adv. Math., arXiv
  14. Uniqueness of blowups for forced mean curvature flow, joint with Jonathan Zhu, 2023, Int. Math. Res. Not., arXiv
  15. Spectral Torical Band Inequalities and Generalizations of the Schoen-Yau Black Hole Existence Theorem, joint with Demetre Kazaras, Marcus Khuri and Yiyue Zhang, 2023, Int. Math. Res. Not., arXiv
  16. Hawking mass monotonicity for initial data sets, 2025, Asian J. Math., arXiv
  17. Rigid comparison geometry for Riemannian bands and open incomplete manifolds, joint with Demetre Kazaras, Marcus Khuri and Yiyue Zhang, 2022, Math. Ann., arXiv
  18. A generalization of Geroch’s conjecture, joint with Simon Brendle and Florian Johne, 2023, Comm. Pure Appl. Math., arXiv
  19. Monotone quantities of p-harmonic functions and their applications, joint with Pengzi Miao and Luen-Fai Tam, 2022, Pure Appl. Math. Q., arXiv
  20. The case of equality for the spacetime positive mass theorem, joint with Yiyue Zhang, J. Geom. Anal., 2022, arXiv
  21. Spacetime Harmonic Functions and the Mass of 3-Dimensional Asymptotically Flat Initial Data for the Einstein Equations, joint with Demetre Kazaras and Marcus Khuri, J. Differential Geom., 2021, arXiv
  22. On the Moduli Space of Asymptotically Flat Manifolds with Boundary and the Constraint Equations, joint with Martin Lesourd, Comm. Anal. Geom., 2021, arXiv
  23. Mass of asymptotically flat 3-manifolds with boundary, joint with Pengzi Miao and Tin-Yau Tsang, Comm. Anal. Geom., 2021, arXiv
  24. Spacetime Harmonic Functions and Applications to Mass, joint with Hubert Bray, Demetre Kazaras, Marcus Khuri and Yiyue Zhang, SIGMA, 2021, arXiv
  25. Contracting convex surfaces by mean curvature flow with free boundary on convex barriers, joint with Martin Li, Asian J. Math., 2023, arXiv
  26. Flatly Foliated Relativity, joint with Hubert Bray, Benjamin Hamm, James Wheeler and Yiyue Zhang, Pure Appl. Math. Q., 2019, arXiv
  27. A Positive Mass Theorem for Manifolds with Boundary, joint with Pengzi Miao, Pac. J. Math., 2019, arXiv

Professional Activities

Seminars and conferences organized

Teaching

Outreach

Upcoming events and talks

Geometric Analysis Seminar

The seminar takes place on Fridays from 3 to 4 pm in Math 507.

Semester: