Tancredi Gherardini (Queen Mary’s College, London) will speak in the geometry seminar on 4th April, at 2pm in the Salle des Profs (9th floor of building NO). Tancredi’s title is “AInstein: Numerical Einstein Metrics through Machine Learning” and his abstract is below.

[Read more…]

Marina Ville (Paris) will speak in the geometry seminar at 2pm on 17th March (in the Salle des Profs, 9th floor building NO). Marina’s title is “Minimal surfaces in R4” and her abstract is below.

Complete minimal surfaces in R3 have been much studied but much less is known about R4. I will recall the main tools in R4, give a couple of examples of minimal planes and focus on complete minimal tori of curvature -8π and one end. In R3 there is a unique example (the Chen-Gackstetter square torus) but in R4 we can construct examples on all the rectangular tori. I will discuss the strategy for the construction and indicate the many questions which remain open. Joint work with Marc Soret.

Frieder Jäckel (Bonn) will talk in the geometry seminar on 10th March, at 2pm in the Salles des Profs (9th floor building NO). Frieder’s title is “The pressure metric on quasi-Fuchsian space” and his abstract is below. Frieder has also kindly agreed to give a “pre-talk” explaining some of the background. This will take place on 10th March at 10am in the Salle Debever (7th floor building NO). The pre-talk title is “A first glimpse into Teichmüller theory and hyperbolic dynamics” and the abstract for that is also below.

[Read more…]

Sebastian Boldt (Chemnitz) will speak in the geometry seminar at 2pm on Monday 10th February, in the Salle des Profs (9th floor of building NO). Sebastian’s title is “The normal injectivity radius of a hypersurface” and his abstract is below.

We present a pointwise lower estimate of the normal radius of an embedded hypersurface in an arbitrary Riemannian manifold. The key ingredient to this result is a new two-sided radial angle comparison theorem. As an application we construct metrics of bounded geometry on manifolds with boundary.