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Number Theory - MAT00085H

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  • Department: Mathematics
  • Credit value: 20 credits
  • Credit level: H
  • Academic year of delivery: 2023-24
    • See module specification for other years: 2024-25

Module summary

Number theory studies the properties of one of the most basic mathematical objects known to humankind. In doing so, it utilises an unusually wide variety of methods and proofs, many of which are surprisingly deep. This course will introduce some of the fundamental problems in this subject, ranging from determining whether a number is a square modulo p or not, to finding the most accurate approximation to real numbers with continued fractions.

Related modules

Pre-requisite modules

Co-requisite modules

  • None

Prohibited combinations

  • None

Module will run

Occurrence Teaching period
A Semester 2 2023-24

Module aims

Number theory studies the properties of one of the most basic mathematical objects known to humankind. In doing so, it utilises an unusually wide variety of methods and proofs, many of which are surprisingly deep. This course will introduce some of the fundamental problems in this subject, ranging from determining whether a number is a square modulo p or not, to finding the most accurate approximation to real numbers with continued fractions.

Module learning outcomes

By the end of the module, students should be able to:

1. Demonstrate facility with the unusually wide variety of methods and proofs which appear in number theory.

2. Apply algorithms taught in the course in specific calculations.

3. Demonstrate the ability to reason in a rigorous, precise and logical manner.

Module content

  • Congruences and residues

  • Primitive roots and quadratic reciprocity

  • Sum of squares

  • Multiplicative functions and average orders

  • Continued fractions and Pell’s equations

Indicative assessment

Task % of module mark
Closed/in-person Exam (Centrally scheduled) 100

Special assessment rules

None

Indicative reassessment

Task % of module mark
Closed/in-person Exam (Centrally scheduled) 100

Module feedback

Current Department policy on feedback is available in the student handbook. Coursework and examinations will be marked and returned in accordance with this policy.

Indicative reading

Rose, A Course in Number Theory, Oxford University Press.


The information on this page is indicative of the module that is currently on offer. The University constantly explores ways to enhance and improve its degree programmes and therefore reserves the right to make variations to the content and method of delivery of modules, and to discontinue modules, if such action is reasonably considered to be necessary. In some instances it may be appropriate for the University to notify and consult with affected students about module changes in accordance with the University's policy on the Approval of Modifications to Existing Taught Programmes of Study.