Mathematics 3158A

Rings and Fields

 

Course Outline

 

Topics covered in the class

  • Jan. 7: Introduction & algebraic elements.
  • Jan. 9: transcendental elements and extension fields.
  • Jan. 14: algebraic elements and extension fields; adjoining roots.
  • Jan. 16: explicit realization of F(\alpha); multple roots; isomorphisms of field extensions;
  • Jan. 21: degree of field extensions; algebraic extensions; compass and straightedge construction
  • Jan. 23: compass and straightedge construction; doubling a cube and trisecting an angle.
  • Jan. 28: finite fields.
  • Jan. 30: finite fields, # of irreducible polynomials.
  • Feb. 4: transcendental extension, transcendence basis.
  • Feb. 6: algebraic closed fields.
  • Feb. 11: primitive elements and primitive element theorem
  • Feb. 13: extensions of a homomorphism
  • Feb. 17-20: reading week.
  • Feb. 24: review of test #1, extension of a homomorphism, finite normal extension, uniqueness of splitting fields.
  • Feb. 27: Examples of Galios groups, splitting fields of irreducible polynomials,
  • Mar. 4: Galois group of finite extension, finite normal extension.
  • Mar. 6: Galois correspondence theorem.
  • Mar. 11: Galois correspondence theorem.
  • Mar. 13: cyclotomic extensions.
  • Mar. 18: cyclotomic polynomials and regular $n$-gon
  • Mar. 20: Kummer extensions.
  • Mar. 25: Solvable groups and solvable extensions.
  • Mar. 27: solvable groups and radical extensions.
  • April 1: example of unsolvable quintic equation; # of real roots; Cardano's formula.
  • April 3: Extensions of degree 4
  • April 8: Extensions of finite fields.
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