Gandalf (Pure Maths Student Seminar): Profinite Completions
15 February 2012 16:15 in CM107Continuing last week's discussions, I will begin with a quick review of the analytic construction of the p-adic numbers, showing its link to the algebraic construction via inverse limits. I will then introduce the notion of "profinite completion" and show how the profinite completion of the integers relates to the p-adic integers.
Gandalf is the pure maths student seminar. Gandalf stands for the Geometry AND ALgebra Forum. It is run by and for pure postgraduates, but welcomes anyone who is interested in coming along.
Content from previous talks is available at the gandalf seminar home page.