Francesco Lin

Associate Professor at Columbia University (CV, MathGenealogy).

Office: Department of Mathematics, Room 613.

Email: flin-at-math.columbia.edu (research), fl2550-at-columbia.edu (teaching).

I am interested in the interplay between geometry, topology and analysis in low dimension. I spend a lot of time thinking about the equations of Maxwell and Dirac on three-manifolds, especially hyperbolic ones.

Publication list and preprints:

Dirac spectral flow and Floer theory of hyperbolic three-manifolds, with M. Lipnowski (spectral movie).
Adjunction inequalities and the Davis hyperbolic four-manifold, with B. Martelli.
Topology of the Dirac equation on spectrally large three-manifolds, Journal of the IMJ.

My work is currently supported by the grants NSF DMS-2503714 and Simons Foundation TSM-00013131.

In Spring 2026, I am teaching Modern Analysis II.
In Fall 2025, I taught the topics course Gauge theory and topology in Pisa.
Lecture notes.
- 1 - From magnetostatics to gauge theory.
- 2 - Curvature and characteristic classes.
- 3 - Yang-Mills theory on Riemannian manifolds.
- 4 - Instantons, monopoles, vortices.
- 5 - Elliptic operators and Sobolev spaces.
- 6 - The Hodge theorem and index theory.
- 7 - The vortex equations on a surface.
- 8 - Geometry of holomorphic line bundles.
- 9 - Symplectic manifolds and moment maps.
- 10 - Moduli spaces in gauge theory.
- 11 - Vortices and symmetric products.
- 12 - Seiberg-Witten theory and Floer homology.

I co-organize the Symplectic Geometry, Gauge Theory, and Categorification seminar.

Last updated 02/26