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February 1, 2023 By GeometryAdmin

Russell Avdek to talk in geometry seminar 14/02/2023

Russell Avdek (Uppsala) will talk in the geometry seminar at 2pm in the Salle des Profs on 14/02/2023. Russell’s title is “Holomorphic curves near convex hypersurfaces” and his abstract is below.

I’ll talk about convex hypersurfaces H in contact manifolds, focusing on the case dim(H) = 4. Every H can be represented by a relation between products of positive Dehn twists on a surface, so it’s easy to describe examples by drawing pictures. A major open problem is to determine when H has a neighborhood which is tight (in the sense of Borman-Eliashberg-Murphy). I’ll describe how tightness can be inferred by studying holomorphic curves and work out some examples, such as for the lantern relation.

Filed Under: geometry seminar news

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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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