The geometry seminar is held roughly every two weeks in term time. We invite speakers with a broad range of expertise, from all areas of differential geometry, algebraic geometry and geometric analysis. If you would like to suggest a speaker, give a talk yourself, or want any further information about the seminar then contact any of the professors in the geometry group.

The schedule for the current term is below. (When a title is a link, clicking it will take you to the abstract.)

You can find a list of the previous talks here.

#### July 2019

- 09/07/19. 14h Salle des Profs, 9th floor, building NO. Brian Weber (University of Pennsylvania). Potential theory and first order equations on degenerating 4-manifolds
*.*

#### June 2019

- 26/06/19.
**Warning! Unusual day AND time.**10h-11h Salle des Profs, 9th floor, building NO. Claude LeBrun (Stony Brook University). Einstein Metrics, Harmonic Forms, and Conformally Kähler Geometry - 11/06/19.
**Warning! Unusual time.**11h30-12h30 Salle des Profs, 9th floor, building NO. Felix Schlenk (Université de Neuchâtel). Manning’s inequality for Finsler and Reeb flows

#### May 2019

- 7/05/19.13h30-14h30 Salle des Profs, 9th floor, building NO. Matthias Meiwes (University of Tel-Aviv, Israel)

Topological entropy and Hofer’s metric

#### April 2019

- 30/04/19.13h30-14h30 Salle des Profs, 9th floor, building NO. Alessandra Pluda (Universitat Regensburg, Germany)

Motion by curvature of networks: analysis of singularities and “restarting” theorems - 2/04/19.13h30-14h30 Salle des Profs, 9th floor, building NO. Stefano Borghini (Uppsala University, Sweden)

Static vacuum spacetimes with positive cosmological constant **Warning! Unusual day and time!**1/04/19.14h-15h Salle des Profs, 9th floor, building NO. Angela Pasquale (Université de Lorraine, France)

Resonances of the Laplacian on products of rank-one symmetric spaces

#### March 2019

**Warning! Unusual room!**19/03/19.13h30-14h30 Salle OF2070. Tristan Ozuch-Meersseman (ENS Paris, France)

Noncollapsed degeneration of Einstein 4-manifolds- 12/03/19.13h30-14h30 Salle des Profs, 9th floor, building NO. Stéphane Launois (University of Kent, UK)

TBA

#### February 2019

**Warning! Unusual time**26/02/19.14h-15h Salle des Profs, 9th floor, building NO. Mariel Saez (PUC, Chile)

On the uniqueness of graphical mean curvature flow**Warning! Unusual day**Monday 25/02/19. 13h30-14h30 Salle des Profs, 9th floor, building NO. Yanir Rubinstein (University of Maryland)

Differential, algebraic, and convex geometry arising from asymptotic positivity- 19/02/19: no geometry seminar will be held this day because of the London-Brussels geometry seminar, see the dedicated webpage
- 12/02/19.13h30-14h30 Salle des Profs, 9th floor, building NO. Giona Veronelli (Université Paris 13)

Distance-like functions on Riemannian manifolds

#### January 2019

- 29/01/19. 13h30-14h30 Salle des Profs, 9th floor, building NO.Yannick Herfray (ULB)

Conformally invariant geodesics in asymptotically hyperbolic manifolds - 22/01/19. 13h30-14h30 Salle des Profs, 9th floor, building NO. Ralph Klaasse (ULB)

Poisson structures of divisor-type and symplectic Lie algebroids - 15/01/19. 13h30-14h30 Salle des Profs, 9th floor, building NO. Matthias Schötz (ULB)

Singular points in non-formal deformation quantization

#### December 2018

- 18/12/18. 13h30-14h30 Salle des Profs, 9th floor, Buildig NO. Cedric de Groote (Stanford University)

TBA - 04/12/18. 13h30-14h30 Salle de Profs, 9th floor, building NO.

Gilles Carron (University of Nantes, France)

A Bonnet-Myers theorem under a spectral condition

#### November 2018

- 27/11/18. 13h30-14h30 Salle de Profs, 9th floor, building NO.

Vincent Beck (University of Tours, France)

Compact flat manifolds constructed from complex reflection groups

#### September 2018

- 25/09/18. 13h30-14h30 Salle de Profs, 9th floor, building NO.

Weiyi Zhang (Warwick University, UK)

From smooth to almost complex

#### Latest news for the geometry seminar

- Brian Weber to speak in the geometry seminar, Tuesday 9 July - Brian Weber (University of Pennsylvania, USA) will speak in the geometry seminar on Tuesday 9 May, at 2pm in the Salle de Profs. Brian’s title is Potential theory and first order equations on degenerating 4-manifolds.
- Felix Schlenk to speak in the geometry seminar, 11 June - Felix Schlenk (Université de Neuchâtel, Switzerland) will speak in the geometry seminar on Tuesday 11 June, at 11.30am in the Salle de Profs. Felix’s title and abstract are to be announced. Matthias’s title is Manning’s inequality for Finsler and Reeb flows and his abstract is below. I will explain parts of recent work with Marcelo […]
- Claude LeBrun to speak in the geometry seminar, Wednesday 26 June - Claude LeBrun (Stony Brook University) will speak in the geometry seminar on Wednesday 26 of June. Claude’s title is Einstein Metrics, Harmonic Forms, and Conformally Kähler Geometry and his abstract is below. There are certain compact 4-manifolds, such as real and complex hyperbolic 4-manifolds, 4-tori, and K3, where we completely understand the moduli space of […]
- Angela Pasquale to speak in the geometry seminar, Monday 1st April - Angela Pasquale (Université de Lorraine) will speak in the geometry seminar on Monday 1st of April, at 2pm in the Salle de Profs. Angela’s title is Resonances of the Laplacian on products of rank-one symmetric spaces and her abstract is below.
- Matthias Meiwes to speak in the geometry seminar, Tuesday 7 May - Matthias Meiwes (University of Tel Aviv, Israel) will speak in the geometry seminar on Tuesday 7 May, at 1.30pm in the Salle de Profs. Matthias’s title is Topological entropy and Hofer’s metric and his abstract is below. A central object in the study of Hamiltonian diffeomorphisms on a symplectic manifold $(M,\omega)$ is Hofer’s metric, a […]