Sebastian Casalaina

Homework and Syllabus

Topics in Algebra

MATH 8174 Spring 2022


Date Topics
Reading
Homework
L1 Monday January 10
Introduction: General overview, and a discussion of some of the main areas of focus.
The following .pdf has a brief review of complex analysis in a single variable.

L2 Wednesday January 12
Discussion of working groups: Start discussions about who wants to work on what topics.


L3 Friday January 14 Introduction continued: Review of some linear and multilinear algebra.
You may want to review an algebra text (e.g., Artin's Algebra, Lang's Algebra, Dummit-Foote's Abstract Algebra, Alufi's Algebra Chapter 0, etc.)
Calum write up notes




Monday January 17
MLK DAY
NO CLASS
MLK DAY
L4 Wednesday January 19
Introduction continued: More review of some linear and multilinear algebra.
Adrian write up notes
L5 Friday January 21
Introduction continued: More review of some linear and multilinear algebra.
Bob write up notes




L6 Monday January 24
Hodge structures: Complex and Hermitian Structures.  Complexification of almost complex vector spaces and alternating products.
Huybrechts Section 1.2 Matt write up notes
L7 Wednesday January 26
Hodge structures: Complex and Hermitian Structures continued. Hermitian forms revisited.
Huybrechts Section 1.2 Justin write up notes
L8 Friday January 28
Hodge structures: Complex and Hermitian Structures continued. Hermitian forms, symplectic forms, and the Hodge star.
Huybrechts Section 1.2 Peter write up notes




L9 Monday January 31
Hodge structures: Complex and Hermitian Structures. The Hodge star continued, and intro to the Lefschetz decomposition.
Huybrechts Section 1.2 Chris write up notes
Wednesday February 2
SNOW DAY




L10 Friday February 4
Hodge structures: Complex and Hermitian Structures. Representations of sl_2(CC), and the Lefschetz decomposition.
Huybrechts Section 1.2 Calum




L11 Monday February 7
Hodge structures: Complex and Hermitian Structures. The Hodge--Riemann bilinear relations.
Huybrechts Section 1.2 Adrian
 L12 Wednesday February 9
WORK IN GROUPS


 L13 Friday February 11
WORK IN GROUPS






L14 Monday February 14
Hodge structures: Basic definitions, polarized Hodge structures. Peters--Steenbrink Section 2.1

You may also want to take a look at Huybrechts Sections 1.2 and 3.C, and Henry Fontana's senior thesis (I am updating these notes and will post the revisions in the next week or so).
Bob
L15 Wednesday February 16
Hodge structures: Hodge structures via Hodge Filtrations. Peters--Steenbrink Section 2.2 Matt
L16 Friday February 18
Hodge structures: Hodge structures via representations of the torus.
Peters--Steenbrink Section 2.3 Justin




L17 Monday February 21
Hodge structures: Mumford--Tate Groups. Peters--Steenbrink Section 2.3 Peter
L18 Wednesday February 23
Introduction to homological algebra, and Hodge structures: Complexes of modules, some basic ideas motivating derived categories, Hodge complexes.
Peters--Steenbrink Section 2.3 Chris
L19 Friday February 25
Introduction to sheaves Introduction to sheaves of abelian groups.
Hartshorne Chapter 2 Section 1
Calum




L20 Monday February 28
Introduction to homological algebra: Derived functors.
Weibel, and Peters--Steenbrink appendix.
Adrian
L21 Wednesday March 2
Introduction to homological algebra: Computing derived functors Weibel, and Peters--Steenbrink appendix. Bob
L22 Friday March 4
Introduction to homological algebra: Spectral sequences. Weibel, and Peters--Steenbrink appendix. Matt




L23 Monday March 7
Introduction to homological algebra: Spectral sequences continued, spectral sequence associated to a filtered complex, and a double complex. Weibel, and Peters--Steenbrink appendix. Justin
L24 Wednesday March 9
Introduction to homological algebra: Spectral sequences continued, examples, Hodge complexes of sheaves. Weibel, and Peters--Steenbrink appendix. Peter
L25 Friday March 11 Mixed Hodge structures: Basic definitions
Peters--Steenbrink 3.1
Chris




L26 Monday March 14
Mixed Hodge structures: The Deligne splitting and applications. Peters--Steenbrink 3.1 Calum
L27 Wednesday March 16
Mixed Hodge structures: Mixed Hodge complexes, and mixed Hodge complexes of sheaves. Peters--Steenbrink 3.3 Adrian
L28 Friday March 18
Mixed Hodge structures: Hypercohomology of a mixed Hodge complex of sheaves, mapping cones, and applications to mixed Hodge structures. Peters--Steenbrink 3.4 Bob




March 21--25 SPRING BREAK
NO CLASS
SPRING BREAK




L29 Monday March 28
Mixed Hodge structures: Extensions in abelian categories Peters--Steenbrink A.2.6
Matt
L30 Wednesday March 30
Mixed Hodge structures: Extensions in abelian categories continued Peters--Steenbrink A.2.6 Justin
L31 Friday April 1
Mixed Hodge structures: Extensions of mixed Hodge structures Peters--Steenbrink 3.5 Peter




L32 Monday April 4
Mixed Hodge structures: Intermediate Jacobians Peters--Steenbrink 3.5
Chris
L33 Wednesday April 6
WORK IN GROUPS

L34 Friday April 8
WORK IN GROUPS





L35 Monday April 11
Review of differential forms
Bott--Tu, Differential Forms in Algebraic Topology
Calum
L36 Wednesday April 13
Vector bundles, cotangent bundles, and differential forms
Lee, Introduction to Smooth Manifolds, Ch.10, Huybrechts.
Adrian
L37 Friday April 15
D-modules: Verdier duality
Peters--Steenbrink Ch. 13.1, Kashiwara--Schapira, Sheaves on Manifolds, Ch.III 3.1-3
Bob




L38 Monday April 18
Kazdhan--Lusztig polynomials and mixed Hodge structures
Elias--Williamson, The Hodge theory of Soergel bimodules, Ann. Math. 2014.
Chris, Justin, Matt (Yano write up)
L39 Wednesday April 20
Simplicial spaces and mixed Hodge structures
Peters--Steenbrink, Chapter 5 (Deligne's paper)
Adrian and Bob (Yano write up)
L40 Friday April 22
The Hodge decomposition and PDE: Lecture 1
Huybrechts, Wells.
Peter (Yano write up)




L41 Monday April 25
The Hodge decomposition and PDE: Lecture 2

Peter (Yano write up)
L42 Wednesday April 27
Torsors, principle bundles, connections, and infinite dimensional Lie groups
Calum (Yano write up)
Friday April 29 READING DAY
NO CLASS
READING DAY




You may want to use LaTeX for typing homework.  If you have a mac, one possible easy way to get started is with texshop; you will want to download the MacTex package.  If you are using linux, there are a number of other possible ways to go, using emacs, ghostview, etc. If you are using windows, you're on your own, but I'm sure there's something online.  This site can help you find LaTeX symbols by drawing: http://detexify.kirelabs.org/classify.html. You may also want to try https://cocalc.com (formerly https://cloud.sagemath.com/) or https://www.overleaf.com (formerly sharelatex) for a cloud version.