Lie Algebras, winter semester 2021/2022
This is the website for the lecture course on Lie algebras and its associated exercise classes.
Content:
This course will give an introduction to Lie algebras and their representation
theory, with a focus on the complex semisimple case. A Lie algebra is a vector
space equipped with a (typically) nonassociative multiplication called Lie
bracket. Lie algebras arise naturally in many contexts in mathematics and
physics, for example as tangent spaces at the identity of Lie groups, and they
can be thought of as spaces of ``infinitesimal'' or ``linearised symmetries''.
The content of the course includes:
 the definition and basic properties of Lie algebras;
 the classical Lie algebras, including a thorough discussion of sl(2,\C) early in the semester;
 the classification problem, nilpotent and solvable Lie algebras;
 semisimple Lie algebras, root systems;
 representation theory of semisimple Lie algebras;
 universal enveloping algebra and PBW theorem;
 an outlook on applications.
This course is mainly aimed at Masters and advanced Bachelor students in
Mathematics and Mathematical Physics.
Prerequisites: basic notions from algebra
(groups, fields, linear algebra).
Coordinates:
Lectures will be in person (please get in contact if you cannot participate in person):
 Monday, 12:1513:45, Geomatikum H6, 11th Oct 21  24th Jan 22
 Thursday, 12:1513:45, Geomatikum H5, 14th Oct 21  27th Jan 22
Exercise classes in two groups. The preparatory meeting was on 11th October.
 Monday, 16:1517:45, online , 18th Oct 21  24th Jan 22. (Access
code via STiNE)
 Thursday, 14:1515:45, Geomatikum 435, 21st Oct 21  27th Jan 22
Initially everyone was signed up for the online group. Between Monday 11th Oct 21
and Thursday 21st Oct 21 it was possible to change registrations in STiNE.
Resources:
Lecture notes were provided during the semester (available now upon request).
Additional notes (not all checked):
Additional references:
 James E. Humphreys: Introduction to Lie Algebras and Representation
Theory, Vol. 9. Graduate Texts in Mathematics. Third printing, revised.
SpringerVerlag, New YorkBerlin, 1980.
 JeanPierre Serre: Lie Algebras and Lie Groups: 1964 Lectures Given
at Harvard University, Vol. 1500 Lecture Notes in Mathematics. Firth printing, 2nd edition
SpringerVerlag, New YorkBerlin, 2006.
Exam:
There will be an oral exam. To qualify for the exam, you should solve
at least 40% of the homework problems and participate actively in the exercise
classes.
Contact:
Paul Wedrich.
