Joe Baine will give the Seminar’s third 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: firstname.lastname@example.org. Title: The K-theory functor Abstract: In this talk we will see how to associate a r(i)ng structure to equivalence classes of complex vector bundles on a compact hausdorff space. We begin by revisiting the direct sum and tensor product constructions, which will define our addition and multiplication respectively. We then prove functorial properties of K and ~K. Finally we will sketch the proof of the fundamental product theorem. Time and date: 3 pm Wednesday* 02 September Seminar website: https://www.maths.usyd.edu.au/u/ciappara/SAS.html *Now the Seminar’s permanent weekly time-slot for Semester 2.