General information |
Course unit name: Local Algebra
Course unit code: 568184
Academic year: 2021-2022
Coordinator: Santiago Zarzuela Armengou
Department: Department of Mathematics and Computer Science
Credits: 6
Single program: S
Estimated learning time |
Total number of hours 150 |
Face-to-face and/or online activities |
70 |
- Lecture |
Face-to-face |
30 |
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- Problem-solving class |
Face-to-face |
30 |
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- Seminar |
Face-to-face |
10 |
Supervised project |
20 |
Independent learning |
60 |
Recommendations |
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Competences to be gained during study |
This course introduces the concepts, results and techniques of local algebra, which allow students to study local properties in various areas of algebra, combinatorics and geometry. It also includes an introduction to the necessary concepts and techniques of category theory and homological algebra.
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Learning objectives |
Referring to knowledge
Referring to abilities, skills
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Teaching blocks |
1. Introduction
1.1. Elements of commutative rings, ideals and modules
1.2. Graded rings and modules
2. Tor and Ext functors
2.1. Module categories; Limits and colimits
2.2. Tensor product and Hom functors
2.3. Projective and injective resolutions
2.4. Tor and Ext functors
2.5. Applications for commutative ring theory
3. Homological dimension; Syzygy theorem
3.1. Global dimension of a ring
3.2. Regular local rings; Characterization: The Auslander-Buchsbaum and Serre theorem
3.3. Syzygy theorem
3.4. Factoriality of regular local rings: Auslander-Buchsbaum theorem
4. Completion
4.1. Completion of abelian topological groups
4.2. Adic completion of a ring
4.3. Noetherian completion
4.4. Hensel’s lemma and some applications of complete rings
5. Koszul complex
5.1. Koszul complex associated to a linear form
5.2. Koszul complex associated to a family of elements
5.3. Regular sequences and the Koszul complex
6. Grade theory
6.1. Module dimensions
6.2. The grade of a module
6.3. Ideals generated by regular sequences
6.4. Complete intersection ideals
7. Cohen-Macaulay rings and modules
7.1. Cohen-Macaulay modules
7.2. Cohen-Macaulay rings
7.3. Transfer of Cohen-Macaulay properties for morphisms
8. Computation and applications of the Hilbert function
8.1. Hilbert functions
8.2. Hilbert-Samuel functions
8.3. Multiplicity of local rings
8.4. Examples and geometrical interpretation
Teaching methods and general organization |
The teaching methodology for the subject includes:
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Official assessment of learning outcomes |
To pass the subject, students must demonstrate proficiency in the subject through continuous assessment. This includes the evaluation of answers to problem-solving exercises completed independently, which are used to assess the capacity and ability to apply acquired knowledge. The individual presentation of a personal project allows teachers to assess the capacity for independent learning and mathematical research. The final grade depends on both the quantity and quality of exercises handed in and the presentation of the personal project and corresponding written report.
Examination-based assessment Students who wish to opt out of continuous assessment must notify the teacher in charge within fifteen days from the commencement of the teaching activities for the subject. |
Reading and study resources |
Consulteu la disponibilitat a CERCABIB
Book
Bourbaki, N. Commutative algebra. Paris : Hermann ; Reading (Mass) : Addison-Wesley, 1972.
Chapters 1-7 |
Bourbaki, N. Algèbre commutative : chapitres 8 et 9. Berlin [etc.] : Springer, 2006.
Bourbaki, N. Algèbre. Chapitre 10, Àlgebre homologique. Paris [etc.] : Masson, 1980.
Bourbaki, N. Algèbre commutative, Chapitre 10,/ Springer-Verlag, Berlin, 2007.
Bruns, W. ; Herzog, J. Cohen-Macaulay rings. Cambridge University Press, 2005.
Eisenbud, D. Commutative algebra with a view toward Algebraic Geometry. Springer, 1996.
Kaplansky, I. Commutative rings. Chicago [etc.] : University of Chicago Press, 1974.
Kunz, E. Introduction to commutative algebra and algebraic geometry. Boston : Birkhäuser, 1991.
Lafon, J. P. Les formalismes foundamentaoux de l’algèbre commutative. Paris : Herrmann, 1974.
Lang, S. Algebra. New York : Springer, 2005.
Matsumura, H. Commutative ring theory. New York : Cambridge University Press, 2008.
Osborne, M. S. Basic homological algebra. New York [etc.] : Springer, 2000.
Sally, J. D. Numbers of generators of ideals in local rings. New York : Marcel Dekker, 1978.
Serre, J. P. Local algebra. Berlin : Springer, 2000.
Zariski, O. ; Samuel, P. Commutative algebra. New York : Springer, [1975-1976]