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February 1, 2023 By GeometryAdmin

Stefan Nemirovski to speak in geometry seminar 14/03/2023

Stefan Nemirovski (Bochum and Moscow) will talk in the geometry seminar at 2pm on 14/03/2023 in the Salles des Profs (9t floor of building NO). Stefan’s title is “Legendrian submanifolds and causality” and his abstract is below.

Roger Penrose observed that the celestial spheres of points in a reasonable spacetime are Legendrian submanifolds in its contact manifold of light rays. It turns out that several notions of causality theory can be defined on spaces of Legendrian submanifolds in a way compatible with the Penrose correspondence. The talk will discuss those notions in the context of global rigidity (and occasionally flexibility) of contact manifolds.

Filed Under: geometry seminar news

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Address

Département de mathématiques
Université libre de Bruxelles CP 218
Boulevard du Triomphe, Bruxelles 1050,
Belgium

Getting here

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 page has a map of the campus as well as information on how to reach it via public transport. See the STIB website for more information on public transport in Brussels.

Image credits

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.

Getting here

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.

Image credits

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.

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