Dear Colleagues and Students,<\/p>\n
You are cordially invited to the ODTU-Bilkent Algebraic Geometry Seminar<\/p>\n
Speaker: Serkan Sonel (Bilkent)
\n\u201cOn K3 surfaces covering an Enriques surface\u201d<\/p>\n
Abstract: We will continue the subject of the previous talks, viz. a characterization of the K3-surfaces covering an Enriques surface.
\nFollowing Nikulin, we will:
\n(1) explain that the existence of a fixed point free involution depends on the *genus* of the transcendental lattice only;
\n(2) give the answer for *most* genera, leaving just a few of them open;
\n(3) outline the difficulties that may arise in the case of those few open genera.
\n(4) determine the complete list of genera of positive definite lattices of arbitrary rank each of whose members represents 1 for rank different from 2 and 3. As an application, we classify K3 surfaces which do not cover any Enriques surface.
\nThis is joint work with SIMON BRANDHORST, DAVIDE CESARE VENIANI.<\/p>\n
Date: 6 December 2019, Friday
\nTime: 15:40
\nPlace: Mathematics Seminar Room, SA \u2013 141<\/p>\n","protected":false},"excerpt":{"rendered":"
Dear Colleagues and Students, You are cordially invited to the ODTU-Bilkent Algebraic Geometry Seminar Speaker: Serkan Sonel (Bilkent) \u201cOn K3 surfaces covering an Enriques surface\u201d Abstract: We will continue the subject of the previous talks, viz. a characterization of the K3-surfaces covering an Enriques surface. Following Nikulin, we will: (1) [\u2026] <\/p>\n