About Course
Introduction to Galois Theory I
We will examine essential ideas from rings and fields, such as polynomial rings, field extensions, and splitting fields, in this introductory course on Galois theory. Then, before defining Galois extensions, we’ll learn about normal and separable extensions. We’ll see several Galois group and Galois extension instances and structures.
The fundamental theorem of Galois theory, which establishes a relationship between Galois group subgroups and Galois extension intermediate fields, will then be proved.
After that, we’ll go over several key applications of Galois theory, such as quintic insolvability, Kummer extensions, and cyclotomic extensions.
This course will place a strong emphasis on problemsolving exercises and providing numerous examples. We’ll give them various tasks to do, and we’ll have weekly problemsolving meetings where we’ll go over each topic in detail.
LAYOUT OF THE COURSE
Week 1: Rings and Fields Review I: polynomial rings, irreducibility criteria, algebraic elements, and field extensions I: polynomial rings, irreducibility criteria, algebraic elements, and field extensions
Week 2: Rings and Fields Review II: finite fields and field splitting
Week 3:Separable extensions vs. normal extensions
Week 4: Galois groups and fixed fields
Week 5: Galois extensions, properties, and examples
Week 6: Galois fundamental theorem
Week 7: Galois fundamental theorem
Week 8: Galois fundamental theorem
Week 9: Galois fundamental theorem
Course Content
Introduction to Galois Theory

mod01lec01 – Motivation and overview of the course
00:00 
mod01lec02 – Review of group theory
00:00 
mod01lec03 – Review of ring theory I
00:00 
mod01lec04 – Review of ring theory II
00:00 
mod01lec05 – Review of field theory I
00:00 
mod01lec06 – Review of field theory II
00:00 
mod01lec07 – Review of field theory III
00:00 
mod02lec08 – Problem Session 1
00:00 
mod02lec09 – Problem Session 2
00:00 
mod02lec10 – Beginning of Galois theory
00:00 
mod02lec11 – Fixed fields
00:00 
mod02lec12 – Theorem I on fixed fields
00:00 
mod02lec13 – Theorem II on fixed fields
00:00 
mod03lec14 – Galois extensions, Galois groups
00:00 
mod03lec15 – Normal extensions
00:00 
mod03lec16 – Problem Session – Part 3
00:00 
mod03lec17 – Problem Session – Part 4
00:00 
mod03lec18 – Separable extension – Part 1
00:00 
mod03lec19 – Separable extension – Part 2
00:00 
mod04lec20 – Characterization of Galois extensions – Part 1
00:00 
mod04lec21 – Characterization of Galois extensions – Part 2
00:00 
mod04lec22 – Examples of Galois extensions
00:00 
mod04lec23 – Motivating the main theorem of Galois theory
00:00 
mod04lec24 – Main theorem of Galois theory – Part 1
00:00 
mod04lec25 – Main theorem of Galois theory – Part 2
00:00 
mod04lec26 – Fundamental theorem of algebra
00:00