Relative version of the Kontsevich-Zagier conjecture on periods.
Friday, 2.12.11, 10:00-11:00, Raum 404, Eckerstr. 1
We formulate and prove a relative version of the K-Z conjecture on periods. In this relative version, numbers (and rational numbers) will be replaced by Laurent series (and rational functions).
Negative curves on algebraic surfaces
Friday, 9.12.11, 10:00-11:00, Raum 404, Eckerstr. 1
It has been a long-standing folklore conjecture going back to Enriques, that on a smooth projective surface over the complex numbers the self-intersection of curves has a lower bound. \n\nIn a joint work with Bauer, Harbourne, Knutsen, Müller-Stach, and Szemberg, we disprove the conjecture with the help of certain Hilbert modular surfaces.
Vorstellungsvortrag
Friday, 16.12.11, 10:00-11:00, Raum 404, Eckerstr. 1