Undergraduate Study

PMH2   Commutative Algebra

General Information

This page relates to the Pure Mathematics Honours course "Commutative Algebra".

Lecturer for this course: Michael Ehrig.

For general information on honours in the School of Mathematics and Statistics, refer to the relevant honours handbook.

Organisational Matters

Office: Carslaw 526


Timetable for Lectures: Monday 11am - 12pm and Tuesday 11am - 12pm in Room 830.

Consultation Hours: Monday 2 - 4pm, Friday 10am - 12pm, or by appointment.

Exam: Tuesday, 26 June, 10am - 1pm in Room 829.


The goal of this course is to study commutative rings and algebras and cover some of the most fundamental theorems in the development of the field: Noether normalisation, Hilbert Nullstellensatz, and the theory of localisation and local rings, among others. Throughout the course we will discuss how to interprete commutative algebra from the view point of affine algebraic geometry and category theory.


1. Two assignments worth 20% each; they will be posted here two weeks before the due date.

Please submit copies to Michael directly either via email or in person.

2. A written exam worth 60% to be held at the end of semester 1, covering the whole content of the course. The exam time and venue will be posted later.


The material will overlap with a number of references, but two that cover many of the subjects are:

M.F. Atiyah and I.G. Macdonald, Introduction to Commutative Algebra, Addison-Wesley 1969.

Miles Reid, Undergraduate Commutative Algebra, Cambridge University Press 1995.


Exercises will be posted here regularly every other week. These will not be collected and marked, but are a good way of learning the material. Many of them are also announced in the lecture and reproduced here.

  • Exercises 1 (Rings and ideals)
  • Exercises 2 (Modules)
  • Exercises 3 (Tensor product and localization)
  • Exercises 4 (Tensor product and chain conditions)