Vishnu Mangalath will give the Seminar’s sixth talk in Semester 2 tomorrow afternoon on Zoom. Please find the details below. Anyone desiring to attend the talk or join the mailing list is warmly invited to get in touch: ciappara@maths.usyd.edu.au. Title: Stiefel-Whitney and Chern classes Abstract: In this talk we will start by reviewing the cup product and the Leray-Hirsch theorem from algebraic topology, and use these to the prove existence and uniqueness of the Stiefel-Whitney and Chern classes for real and complex vector bundles. We will then look at some simple applications of these classes. Time and date: 3 pm Wednesday 30 September Seminar website: https://www.maths.usyd.edu.au/u/ciappara/SAS.html