Lie Theory
RTG Reading Group, Spring 2023

Reading group on Lie Theory organized as part of the Graduate directed reading for undergraduates.

Mentors (email)
Abhik Pal
Runqiu Xu
Suhas Gondi
Meeting time and location
Wed 2:00-3:00pm, HSS 4025
References
•  John Stillwell, Naive Lie Theory
•  William Fulton and Joe Harris, Representation Theory: A First Course
•  James Humphreys, Introduction to Lie Algebras and Representation Theory
•  John M. Lee, Introduction to Smooth manifolds (2ed)

Schedule

Each session will consist of short talks by the participants on the assigned reading for that week. We will recommend some exercises to discuss after the talk.

Apr 12: Some basic examples
Reading: Sec 1.3, 1.5, 2.1, 2.3, 2.4, 2.5 (Stillwell)
Exercises: 1.5.3, 1.5.5, 2.3.5, 2.6.4 (Stillwell)
Speaker: Matthew Yao
Apr 19: The exponential map
Reading: Sec 3.2 3.3, 3.5, Ch 4 (Stillwell)
Optional Reading: Ch 7 (Lee)
Exercises: 3.2.1, 4.4.2, 4.5.4 (Stillwell)
Speaker: Aiyang Lu
Apr 26: Tangent space and Lie algebras
Reading: Ch 5, 6 (Stillwell)
Speaker: Fuxiang Yang
May 3: Representation theory of the symmetric group
Reading: Sec 1.1, 1.2, 2.1, 4.1, 4.2 (Fulton and Harris)
Speaker: Frederick Rajasekaran
May 10: Representations of \(\mathfrak{sl}_2(\mathbf C)\)
Reading: Ch 11 (Fulton and Harris), Sec II.7 (Humphreys)
Exercises: Ex. 11.10, 11.13 (Fulton and Harris)
Optional exercises: Ex. 11.11, 11.14 (Fulton and Harris)
Speaker: Kaoru Otsuka (notes)
May 17: Generalization to an arbitrary semi-simple Lie algebra
Reading: Ch 12, 14 (Fulton and Harris)
Speaker: Andrew Paul
May 24: Representations of \(\mathfrak{sl}_3\mathbf{C}\)
Reading: Ch 13 (Fulton and Harris)
Speaker: Matthew Yao
May 31: Final presentation preparation