日本語

Course Code etc
Academic Year 2023
College College of Science
Course Code CA456
Theme・Subtitle
Class Format Face to face (all classes are face-to-face)
Class Format (Supplementary Items)
Campus
Campus Ikebukuro
Semester Fall semester
DayPeriod・Room Mon.2・4339
Credit 2
Course Number MAT3120
Language Japanese
Class Registration Method Course Code Registration
Grade (Year) Required 配当年次は開講学部のR Guideに掲載している科目表で確認してください。
prerequisite regulations
Acceptance of Other Colleges
course cancellation
Online Classes Subject to 60-Credit Upper Limit
Relationship with Degree Policy
Notes
Text Code CA456

【Course Objectives】

In "Algebra 3", the goal is (1) to understand field theory and Galois theory in arbitrary characteristic, (2) to understand the relationship between solutions of polynomial equations and Galois theory, and understand infinite Galois extensions.

【Course Contents】

There are formulas to express solutions of polynomials in degrees at most four. However, it was proved in the 19th century by Abel that there is no algebraic formula for the solutions of a general polynomials in degrees at least five. In this lecture we discuss the solutions of polynomials in degree 3 and 4, and explain the proof of Abel's theorem. After this, the notaion of separable and inseparable extensions will be introduced to develop Galois theory in arbitrary characteristic. Using Galois theory, it will be explained how one can give a criterion for the solutions of polynomial equations in terms of the Galois group.

※Please refer to Japanese Page for details including evaluations, textbooks and others.