Chow group of algebraic varieties (more generally, of noetherian schemes) include the well-known classical invariants like the ideal class group of algebraic integer rings and the divisor class group of Riemannian surfaces. We will start this course with overview and basic materials on algebraic cycles, and then introduce the Brauer-Manin pairing, which is an important tool to study the Chow groups of 0-cycles of varieties over p-adic fields to explain a certain non-degeneracy fact on this pairing. Moreover, we will introduce an arithmetic cohomology theory of schemes over integer rings, and expain that this non-degeneracy is closely related with the surjectivity of a cycle class map with values in this arithmetic cohomology groups.
・Understand the definition of Chow groups
・Understand the relation between Chow groups of 0-cycles and Brauer groups of varieties over p-adic fields
・Understand the relation between the surjectivity of cycle class map of schemes over integer rings with well-known problems on cycles.
algebraic variety, algebraic cycle, Chow group, Brauer group, Brauer-Manin pairing, cycle class map
✔ Specialist skills | Intercultural skills | Communication skills | Critical thinking skills | Practical and/or problem-solving skills |
This is an intensive lecture course. There will be some assignments.
Course schedule | Required learning | |
---|---|---|
Class 1 | Overview, and some basics on algebraic cycles | Details will be provided during each class session |
Class 2 | rational equivalence and Chow's moving lemma | Details will be provided during each class session |
Class 3 | Chow groups of 0-cycles and Albanese mappings | Details will be provided during each class session |
Class 4 | relation between the Chow groups and the Grothendieck group 1 | Details will be provided during each class session |
Class 5 | relation between the Chow groups and the Grothendieck group 2 | Details will be provided during each class session |
Class 6 | Brauer group of a field and Galois cohomology 1 | Details will be provided during each class session |
Class 7 | Brauer group of a field and Galois cohomology 2 | Details will be provided during each class session |
Class 8 | Brauer gorup of a scheme and étale cohomoloy 1 | Details will be provided during each class session |
Class 9 | Brauer gorup of a scheme and étale cohomoloy 2 | Details will be provided during each class session |
Class 10 | Lichtenbaum-Manin pairing of varieties over p-adic fields 1 | Details will be provided during each class session |
Class 11 | Lichtenbaum-Manin pairing of varieties over p-adic fields 2 | Details will be provided during each class session |
Class 12 | Lichtenbaum-Manin pairing of varieties over p-adic fields 3 | Details will be provided during each class session |
Class 13 | cycle class maps of schemes over integer rings 1 | Details will be provided during each class session |
Class 14 | cycle class maps of schemes over integer rings 2 | Details will be provided during each class session |
Class 15 | cycle class maps of schemes over integer rings 3 | Details will be provided during each class session |
None required
Hartshorne, R.: Algebraic Geometry, (Graduate Texts in Math. 52), Springer 1977
Saito, S., Sato, K.: Algebraic cycles and Étale cohomology, (Springer Modern Math. Series 17), Maruzen 2012 (in Japanese)
Assignments (100%).
Basic knowledge on algebra is expected