Dear All, We are delighted to present the MaPSS Seminar topic of Monday 29/08; please see the abstract below. **This Semester the Seminar will always run on Monday, at 5:00pm in 535A** Following the talk, there will be pizza on offer. Speaker: Edwin Spark (Sydney University) Title: The McKay Correspondence: An introduction to ADE Classification Abstract: Dynkin diagrams (sometimes referred to as Coxeter-Dynkin diagrams) appear in many independent classification theorems, particularly those diagrams of ADE type. In this talk we will characterise these simply laced diagrams, which can be thought of as graphs, and then look at an example of an ADE classification: the McKay correspondence that connects the classification of finite subgroups of SL(2) to the classification of affine Dynkin diagrams. Supervisors, please encourage your students to attend. Thanks, MaPSS Organizers