Handouts
Condensed extracts of commonly recurring topics.
Vector calculus, pdf
Point set topology, pdf
Commutative rings and fields, pdf
Polynomial rings and irreducibility, pdf
Field extensions and Galois theory, pdf
Modules over commutative rings, pdf
Constructability and solvability (and origami), pdf
Elementary group theory
What is abstract algebra?, pdf, video
Sets and subsets, pdf, video
Logical statements, pdf, video
Set operations, pdf, video
Functions, pdf, video
Properties of the integers, pdf, video
Groups (definition, first examples), pdf, video
Basic properties of groups, pdf, video
Groups of orders 1-3, pdf, video
Groups of orders 4-8, pdf, video
Equivalence relations, pdf, video
Integers modulo n, pdf, video
Important facts about integers modulo n, pdf, video
Subgroups, pdf, video
Lagrange's theorem, pdf, video
Cyclic groups, pdf, video
Symmetric groups, part 1, pdf, video
Symmetric groups, part 2, pdf, video
Homomorphisms, pdf, video
Basic properties of homomorphisms, pdf, video
Cayley's theorem, pdf, video
More properties of homomorphisms, part 1, pdf, video
More properties of homomorphisms, part 2, pdf, video
Normal subgroups, pdf, video
Centers, centralizers, and normalizers, pdf, video
Quotient groups, pdf, video
First isomorphism theorem, pdf, video
Diophantine approximation and aperiodic order
Lecture notes covering the following topics: background on Diophantine approximation, shift spaces and Sturmian words, point sets in Euclidean space, cut and project sets, crystallographic restriction and construction of cut and project sets with prescribed rotational symmetries, a dynamical formulations of pattern recognition in cut and project sets, a discussion of diffraction, and a proof that cut and project sets have pure point diffraction measures.
Slides: Historical background, point sets in Euclidean space, cut and project sets, crystallographic restriction, and constructing lattices and cut and project sets with prescribed rotational symmetries pdf
Slides: Review of fourier analysis, measures, tempered distributions pdf
Slides: Dynamical encoding of patches, LR classification for cubical cut and project sets, discussion of canonical cut and project sets, and examples pdf
Introduction to tiling spaces and cut and project sets
Handout for workshop at 18th Galway Topology Colloquium, June 2015
Tiling spaces and cut and project sets, pdf
Topology of tiling spaces
Lectures given by
Lorenzo Sadun at the University of York in April 2014.
Lecture 1, pdf
Handout 1, pdf
Lecture 2, pdf
Handout 2, pdf
Link to Lorenzo's paper on PE cohomology
Lecture 3, pdf
Handout 3, pdf
Lecture 4, pdf
Constructibility, solvability, and origami
Slides from a public lecture given for the York University Math Society
Slides from lecture, pdf
Video of lecture is available here
Topological groups
A reading course held at the University of Bristol in Fall 2012.
Review of measure theory, Sara Munday, pdf
Hausdorff measure and dimension, Adam Morgan, pdf
Review of point-set topology, Alan Haynes, pdf
Properties of topological groups and Haar measure, Efthymios Sofos, pdf
p-adic numbers, Martin Hauge pdf
Adeles and ideles, Matthew Palmer, pdf
Characters and the Fourier inversion formula, Daniel El-Baz, pdf
Pontryagin duality, Samuel Chow, pdf
An application to ergodic theory, Christopher White, pdf
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