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Fakultät für Mathematik Universität Regensburg
Rational Homotopy Theory
Semester
SoSe 2023

Lecturer
Luca Pol

Type of course (Veranstaltungsart)
Vorlesung

German title
Rationale Homotopietheorie

Contents
Rational homotopy theory is a simplified version of homotopy theory where the torsion on the
homotopy groups of a space is discarded. It has the advantage of being remarkably computational and
its simplicity makes it possible to address a number fundamental questions in topology and geometry.
In this course we will present the Sullivan model for rational homotopy theory via commutative
differential graded algebras and discuss some applications. In particular we will explain how to use
the calculational force of rational homotopy theory to give answers to the closed geodesic problem:
does every closed Riemannian manifold of dimension greater than one have infinitely many
geometrically distinct closed geodesics?

Literature
Yves Félix , Stephen Halperin , Jean-Claude Thomas, "Rational homotopy theory"
Dennis Sullivan, "Infinitesimal computations in topology"

Recommended previous knowledge
Algebraic Topology I and II. Basic knowledge of singular cohomology and higher homotopy groups is
recommended but not strictly necessary.

Time/Date
Monday 4-6 pm, Thursday 4-6 pm

Location
M102

Course homepage
https://sites.google.com/view/lucapol/rational-homotopy-theory
(Disclaimer: Dieser Link wurde automatisch erzeugt und ist evtl. extern)

Registration
  • Preliminary registration for the organisation of exercise classes: at the end of the previous
    semester via EXA or LSF (see announcement by the department)
  • Registration for course work/examination/ECTS: FlexNow
Course work (Studienleistungen)
  • Successful participation in the exercise classes: 50% of the points
Examination (Prüfungsleistungen)
  • Oral exam: Duration: 30 minutes, Date: tba, re-exam: Date: tba
Additional comments
There will be 4-5 exercises classes.

Modules
BV, MV, MArGeo, MGAGeo

ECTS
6
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