**Michael Lipnowski**

**Assistant Professor, Department of Mathematics and Statistics, McGill University**

Email: michael "dot" lipnowski "at" mcgill "dot" ca

Office: Burnside 1107

I am currently an Assistant Professor in the McGill University Department of Mathematics and Statistics. My thesis advisor was Akshay Venkatesh. My research interests include *number theory, representation theory, and automorphic forms*.

Here are my CV and publication list. Here is some information about number theory in Montreal.

**Papers**

**Completed**

Closed geodesics and Froyshov invariants of hyperbolic three-manifolds, with Francesco Lin. Submitted.

Towards optimal spectral gaps in large genus, with Alex Wright. Submitted.

Cohen-Lenstra heuristics and bilinear pairings in the presence of roots of unity, with Will Sawin and Jacob Tsimerman. Submitted.

The Seiberg-Witten equations and the length spectrum of hyperbolic 3-manifolds, with Francesco Lin.

*Journal of the AMS*, accepted for publication.Monopole Floer homology, eigenform multiplicities, and the Seifert-Weber dodecahedral space, with Francesco Lin.

*IMRN*, accepted for publication.How large is A_g(F_q)?, with Jacob Tsimerman.

*Duke Math Journal*(2018).Geometry of the smallest 1-form eigenvalue on hyperbolic manifolds, with Mark Stern.

*GAFA*(2018).Cohen Lenstra Heuristics for Étale Group Schemes and Symplectic Pairings, with Jacob Tsimerman.

*Compositio Mathematica*(2019).Detecting large simple rational Hecke modules for Γ_0(N) via congruences, with George Schaeffer.

*IMRN*(2020).On Bhargava's heuristics for GL_2(F_p)-number fields and the number of elliptic curves of bounded conductor.

*Experimental Mathematics*(2021).Twisted limit formula for torsion and cyclic base change, with Nicolas Bergeron.

*Journal de'l École polytechnique - Mathématiques*(2017).Equivariant torsion and base change.

*Algebra and Number Theory*(2015).The equivariant Cheeger-Muller theorem on locally symmetric spaces.

*JIMJ*(2016).

**In preparation**

Algorithms for the topology of arithmetic groups and Hecke actions, with Aurel Page. Slides 1, Slides 2, Summary.

Polarization counting for abelian varieties over finite fields, with Jacob Tsimerman. Summary.

Growth of torsion for weight 1 modular forms, with Gerard Freixas i Montplet and George Schaeffer. Summary.

**Computer code**

Bilinear pairings on (relative) class groups in the presence of roots of unity. Used to compute class group data as part of this paper.

**Expository Writings**

Below are informal notes written to accompany lectures that I presented for various installments of Stanford's number theory learning seminar.

**Teaching**

**Teaching**