János Kollár (Princeton University). Existence of Conic bundles that are not birational to numerical Calabi–Yau pairs. Friday 23rd Sep., 1:30-2:30pm. Huxley 503.
Abstract: Let X be a general conic bundle over the projective plane with branch curve of degree at least 19. We prove that there is no normal projective variety Y that is birational to X and such that some multiple of its anticanonical divisor is effective. We also give such examples for 2-dimensional conic bundles defined over a number field.
Jacob Rasmussen (Cambridge University). TBA. Friday 14th Oct., 1:30-2:30pm. Huxley 341.
Gavril Farkas (Humboldt Universität). TBA. Friday 21st Oct., 1:30-2:30pm. Huxley 341.
Jenia Tevelev (University of Massachusetts at Amherst). TBA. Friday 28th Oct., 1:30-2:30pm. Huxley 341.
Arnaud Beauville (Université de Nice). TBA. Friday 25th Nov., 1:30-2:30pm. Huxley 341.