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.*

differential geometry at the Université libre de Bruxelles

By bruno

*Potential theory and first order equations on degenerating 4-manifolds.*

The department of mathematics is in building NO, on the Campus de la Plaine, of the Université libre de Bruxelles. The geometry group is on the 7th floor. This map shows NO, as well as the metro station Delta and entrance 2, which is right by the stop for the number 71 and 72 buses. The number 95 also stops a short walk from the department. See the STIB website for more information on public transport in Brussels.

Polished ammonite fossil, by Kara Stenberg, Creative Commons licence CC BY-NC 2.0.

Model of 3D projection of a 120-cell, by Edmund Harriss.

The root system of the exceptional Lie algebra E8. By Jared Tarbell, Creative Commons Licence CC BY 2.0.