We discuss the Brauer-Manin obstruction on del Pezzo surfaces of degree 4. We outline a detailed algorithm for computing the obstruction and provide associated programs in magma. This is illustrated with the computation of an example with an irreducible cubic factor in the singular locus of the defining pencil of quadrics (in contrast to previous examples, which had at worst quadratic irreducible factors). We exploit the relationship with the Tate-Shafarevich group to give new types of exampl...Expand abstract
- Publication date:
- Local pid:
- Copyright date:
The Brauer-Manin Obstruction and Sha.
Views and Downloads
If you are the owner of this record, you can report an update to it here: Report update to this record