# MA6H8 Ring Theory

**Lecturer:** Charudatta Hajarnavis

**Term(s):** Term 1

**Commitment:** 30 Lectures

**Assessment:** Oral Exam

**Prerequisites:** Familiarity with basic concepts in rings and modules. e.g. from the MA3G6 Commutative algebra course.

**Content**: We aim to study noncommutative rings with chain conditions. A commutative integral domain has a (unique) field of fractions. What happens if we drop the commutativity axiom? Do we now obtain a division ring of fractions? If not always then when exactly? Do we need to differentiate between the left hand side and the right hand side of the ring? Also, does the theory extend meaningfully to rings such as rings of matrices which contain zero divisors? We shall give precise answers to all these questions.

Topics covered in pursuit of the above will include prime and semiprime rings, Artinian rings, composition series, the singular submodule, Ore’s theorem leading up to Goldie’s theorems and their applications.

**Books:** (For background reading and further study only):

A.W.Chatters and C.R.Hajarnavis, Rings with chain conditions (QA251.5.C4)

K.R.Goodearl and R.B.Warfield,Jr., An introduction to noncommutative Noetherian Rings (QA251.5.G6)

J.C.McConnell and J.C.Robson, Noncommutative Noetherian rings (QA251.5M2)

N.H.McCoy, Rings and ideals (QA247.M33)

L.H.Rowen, Ring Theory (QA247.R68)