28446 - Algebraic topology 1

Academic Year 2022/2023

  • Teaching Mode: Traditional lectures
  • Campus: Bologna
  • Corso: First cycle degree programme (L) in Mathematics (cod. 8010)

Course contents

Cell complexes. Homotopy of maps and spaces.

The fundamental group. Homotopy invariance and dependance upon the base point.

Free and amalgamated products of groups. The Seifert Van Kampen theorem. Application to graphs.

Covering of a topological space. Lifting proeprties, Covering and fundamental group.

Singular and simplicial homology of a topological space. Excision theorem, Mayer Vietoris exact sequence. Sketch of Hurewicz theorem.

Cohomology and its relation with homology. Cup product. Poincaré duality for topological manifolds. Axioms  for cohomology.

Universal coefficints Theorems.  Ext and Tor groups.

A sketch of sheaf cohomology.

Applications: Classical Theorems of topology, invariance of domain, fixed point theorems.  

Readings/Bibliography

A. Hatcher: Algebraic Topology

Teaching methods

Lectures at the blackboard

Assessment methods

Oral exams and exercises given during the course.

Office hours

See the website of Luca Migliorini