Math 202B - Applied Algebra II (Winter 2020)

We will cover representation theory of finite groups and symmetric functions with an emphasis on representation theory of symmetric groups and time permitting, polynomial functors.
There is no single textbook for this course, but you may find some of the following books useful: In addition, here are my typed notes for the course: Notes (last updated 2/28/2020)

Homework

Homework is due in class on the date listed.

Other resources

Schedule

The topics will be filled in as we go, but the order will always follow my notes, so you know which topics will be coming up.
Jan 6Definitions and basic operations for linear representations of finite groups (1.1, 1.2)
Jan 8Irreducible representations (1.3)
Jan 10Characters (1.4)
 
Jan 13Classification of representations (1.5)
Examples (1.6)
Jan 15Examples (1.6)
Group algebra (1.7)
Jan 17Restriction and induction (1.8)
Partitions (2.1)
 
Jan 20no class
Jan 22Tabloids (2.2)
Specht modules (2.3)
Jan 24Specht modules (2.3)
 
Jan 27 Garnir relations and standard tableaux (2.4)
HW1 due
Jan 29Symmetric functions definitions (3.1)
Monomial symmetric functions (3.2)
Jan 31Elementary symmetric functions (3.3)
Involution ω (3.4)
Complete homogeneous symmetric functions (3.5)
 
Feb 3Power sum symmetric functions (3.6)
Scalar product (3.7)
Feb 5 Scalar product (3.7)
Symmetric groups (5.1)
Frobenius characteristic map (5.2)
Feb 7 Frobenius characteristic map (5.2)
Semistandard Young tableaux (4.1)
 
Feb 10 RSK algorithm (4.2)
HW2 due
Feb 12 Dual RSK algorithm (4.3)
Determinantal formula (4.4)
Feb 14 Multiplying Schur functions (4.5)
 
Feb 17no class
Feb 19no class HW3 due
Feb 21Jacobi-Trudi identity (4.6)
 
Feb 24Murnaghan-Nakayama rule (5.3)
Feb 26Murnaghan-Nakayama rule (5.3)
Formula for # standard Young tableaux (6.1)
Feb 28 Formula for # standard Young tableaux (6.1)
Formula for # semistandard Young tableaux (6.2)
 
Mar 2 Littlewood-Richardson coefficients
HW4 due
Mar 4 Polynomial representations of the general linear group
Mar 6 Polynomial representations of the general linear group
 
Mar 9 Schur modules
Mar 11 Polynomial functors
Mar 13 Schur-Weyl duality