Course Archives Theoretical Statistics and Mathematics Unit
Course: Commutative Algebra I
Instructor: Ramesh Sreekantan
Room: G25
Level: Postgraduate
Time: Currently offered
Past Exams

Syllabus: 1. Rings and ideals: review of ideals in quotient rings; prime and maximal ideals, prime ideals under quotient, existence of maximal ideals; operations on ideals (sum, product, quotient and radical); Chinese Remainder theorem; nilradical and Jacobson radical; extension and contraction of ideals under ring homomorphisms; prime avoidance.

2. Free modules; Projective Modules; Tensor Product of Modules and Algebras; Flat, Faithfully Flat and Finitely Presented Modules; Shanuels Lemma.

3. Localisation and local rings, universal property of localisation, extended and contracted ideals and prime ideals under localisation, localisation and quotients, exacteness property. Results on prime ideals like theorems of Cohen and Isaac. Nagatas criterion for UFD and applications; equivalence of PID and one-dimensional UFD.

4. Modules over local rings. Cayley-Hamilton, NAK lemma and applications. Examples of local-global principles. Projective and locally free modules. Patching up of Localisation.

5. Polynomial and Power Series Rings. Noetherian Rings andModules. Hilberts Basis Theorem. Associated Primes and Primary Decomposition. Artininan Modules. Modules of Finite Length.

6. Integral Extensions: integral closure, normalisation and normal rings. Cohen-Seidenberg Going-Up Theorem. Hilberts Nullstellensatz and applications.

7. Valuations, Discrete Valuation Rings, Dedekind domains.

Suggested Texts :

1. N.S. Gopalakrishnan, Commutative Algebra, Oxonian Press (1984).

2. M.F. Atiyah and I.G. Macdonald, Introduction to commutative algebra, Addision-Wesley (1969).

3. M. Reid: Undergraduate commutative algebra, LMS Student Texts (29), Cambridge Univ.Press (1995).

4. R.Y. Sharp: Steps in commutative algebra, LMS Student Texts (19), Cambridge Univ. Press (1995).

5. E. Kunz: Introduction to commutative algebra and algebraic geometry, Birkhauser (1985).

6. D.S. Dummit and R.M. Foote: Abstract Algebra (Part V), John Wiley (Asian reprint 2003).

7. D. Eisenbud: Commutative algebra with a view toward algebraic geometry GTM (150), Springer-Verlag (1995).

8. F. Ischebeck and Ravi A. Rao, Ideals and Reality, Springer (2005).

Midterm Exam marks
Assignment marks
Final Exam marks
Total 100 marks

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Past Exams
07.pdf 09.pdf 11.pdf 13.pdf 15.pdf 17.pdf
07.pdf 09.pdf 11.pdf 13.pdf 15.pdf 17.pdf
Supplementary and Back Paper
07.pdf 11.pdf 15.pdf

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