#### A.Y. 2019 / 2020

Professor
Period
First semester
Credits
6
Duration/Length
48
Type of Learning Activity
Programme specific subjects
Study Path
[PDS0-2018 - Ord. 2018] common
Syllabus
Teaching language

English

Learning objectives

Knowledge and understanding: understanding the most important homology and coomology theories in algebraic topology, knowing the main applications of these

Prerequisites

General topology, basic algebra

Contents

Algebraic topology: simplicial and singular homology, cellular homology, cohomology

Teaching format

During the lesson theoretical aspects and exercises are presented by using the blackboard. Students are strongly invited to actively take part to the lessons. Regularly I assign to the students some exercises as homework and then solutions are discussed in class.

Extended Programme

Simplicial homology: simplices and simplicial complexes; simplicial homology groups; zero dimensional homology groups; homology of cones.

Singular homology: basic homological algebra; singular homology groups; topological invariance; zero dimensional homology groups; homology of a point; homotopy invariance; long exact homology sequence; relative homology; excision; Mayer-Vietoris exact sequence; Eilenberg–Steenrod axioms; homology of spheres; fixed point theorem of Brower; degree of maps between spheres; generalized Jordan curve theorem and invariance of domain; isomorphism between singular and simplicial homology; Euler characteristic; homology with coefficients; the Tor functor; the universal coefficient theorem for homology.

Cellular homology: CW complexes; cellular homology groups; equivalence with singular homology; cellular boundary formula; classification and homology of surfaces.

Cohomology: cohomology groups; the Ext funtor; universal coefficient theorem for cohomology; Poincaré duality.

End-of-course test

Six possible dates, each consisting of an oral exam. The student has to be able to explain the constructions and the definitions introduced during the course and to present the proof of the theorems which I explained during the lessons

Other information

Homework assignments can be found in my webpage: http://www.dmi.units.it/~mecchia/.

Texts/Books

main textbooks:

J. R. Munkres, Elements of Algebraic Topology. Addison-Wesley Publishing Company 1984

A. Hatcher, Algebraic Topology. Cambridge University Press 2002 (http://www.math.cornell.edu/~hatcher/AT/ATpage.html)

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