MATH40880 Number Theory

Academic Year 2024/2025

This course will be an introduction to Algebraic Number Theory.
Topics will be chosen from:
Gauss' reciprocity law and classification of conics over finite fields.
Point counting over finite fields.
p-adic numbers, basic p-adic analysis, multiplicative structure of p-adic fields, Hensel's Lemma.
Conics over p-adic fields and Hilbert symbol.
Hasse-Minkowski theorem and classification of conics over number fields.
An introduction to elliptic curves (group structure and Mordell-Weil theorem).
Ideal class group and the class number formula.

Show/hide contentOpenClose All

Curricular information is subject to change

Learning Outcomes:

The student is expected to develop an understanding of the following concepts:

(i) Gauss' reciprocity law and classification of conics over finite fields

(ii) Point counting over finite fields (Chevalley-Warning Theorem).

(iii) p-adic numbers, basic p-adic analysis, multiplicative structure of p-adic fields, Hensel's Lemma, conics over p-adic fields and Hilbert symbol.

(iv) Hasse-Minkowski theorem and classification of conics over number fields.

The module will cover one of the following 2 threads:

(v) An introduction to elliptic curves (group structure and Mordell-Weil theorem).

(vi) Ideal class group and the class number formula.

Indicative Module Content:

Gauss' reciprocity law and classification of conics over finite fields.
Point counting over finite fields.
p-adic numbers, basic p-adic analysis, multiplicative structure of p-adic fields, Hensel's Lemma.
Conics over p-adic fields and Hilbert symbol.
Hasse-Minkowski theorem and classification of conics over number fields.
An introduction to elliptic curves (group structure and Mordell-Weil theorem).
Ideal class group and the class number formula.

Student Effort Hours: 
Student Effort Type Hours
Lectures

30

Tutorial

6

Specified Learning Activities

24

Autonomous Student Learning

48

Total

108

Approaches to Teaching and Learning:
active/task-based learning; peer and group work; lectures; enquiry & problem-based learning. 
Requirements, Exclusions and Recommendations
Learning Requirements:

MATH30400 & MATH30030, or the consent of the module coordinator.

Also advisable: MATH30090 & MATH30040.


Module Requisites and Incompatibles
Pre-requisite:
MATH30030 - Advanced Linear Algebra, MATH30400 - Further Groups and Rings


 
Assessment Strategy  
Description Timing Component Scale Must Pass Component % of Final Grade In Module Component Repeat Offered
Exam (Take-Home): Examination: Take-home final exam Week 14 Standard conversion grade scale 40% No

55

No
Exam (Online): Examination: Midterm exam Week 6 Standard conversion grade scale 40% No

20

No
Exam (Online): Examination: Midterm exam Week 10 Standard conversion grade scale 40% No

15

No
Assignment(Including Essay): Weekly assignments Week 3, Week 4, Week 5, Week 6, Week 7, Week 8, Week 9, Week 10, Week 11, Week 12 Standard conversion grade scale 40% No

10

No

Carry forward of passed components
No
 
Resit In Terminal Exam
Autumn Yes - 2 Hour
Please see Student Jargon Buster for more information about remediation types and timing. 
Feedback Strategy/Strategies

• Feedback individually to students, post-assessment
• Group/class feedback, post-assessment
• Self-assessment activities

How will my Feedback be Delivered?

Self-assessment activities are tentative and will be based on the following model: Students will be asked to grade their responses to midterm exams, based on a detailed solution sheet. They will prepare a detailed report on their weaknesses in key aspects of the module. Based on the accuracy of this report, their homework grades will be positively updated. The other two feedback strategies to employ (Feedback individually to students, post-assessment and Group/class feedback, post-assessment) are self-explanatory.

Number Theory 1: Fermat’s Dream (by K. Kato et al), Softcover ISBN: 978-0-8218-0863-4

Primes of the Form x2+ny2: Fermat, Class Field Theory, and Complex Multiplication, 2nd Edition (by David A. Cox), ISBN: 1118390180

Rational Points on Elliptic Curves (by J. Silverman & J. Tate), ISBN: 978-3319185873