SUNY at Stony Brook MAT 656:
Fall 2020

Weekly Plan

Day Topic (and a video link)
Aug 24 Overview
Aug 26 Nielsen's Method
Aug 31 Nielsen's Method, fundamental group
Sep 2 Covering Theory
Sep 9 Cayley graph, Hawaiian earring
Sep 14 Free product with amalgamation, Seifert--van Kampen theorem
Sep 16 Seifert--van Kampen theorem
Sep 21 graph of groups, HNN extension
Sep 23 Undecidability of Word Problem
Sep 28 Hyperbolic groups
Sep 30 Dehn function, groups acting on trees
Oct 5 Curves on Surfaces
Oct 7 Geometric intersection number
Oct 12 Spiders
Oct 14 Birman exact sequence
Oct 19 Dehn–Nielsen–Baer theorem
Oct 21 Pseudo-Anosov maps
Oct 26 More about train tracks
Oct 28 Final remarks on Mapping class groups
Nov 2 Hurwitz equivalence
Nov 4 Bisets
Nov 9 Iterated Monodromy Groups
Nov 11 Symbolic Dynamics: Coding Tree
Nov 16 Symbolic encodings of Julia sets
Nov 18 Twisting rabbit problem
Nov 30 The Basilica IMG Group
Dec 2 Amenability