[Alta-Logic] Peripatetic seminar talk: Peter Zvengrowski

[Robin Cockett]

Where/when: ICT615, 3:30pm, 30th March 20011

Speaker; Peter Zvengrowski

Title: Goursat's Lemma About Subobjects of Direct Products 

Abstract:
     This talk will be an elementary exposition of Goursat's Lemma, which describes how to find the
subgroups of $A\times B$, where $A,B$ are two given groups. In fact this lemma appears as a homework
problem in some undergraduate algebra texts. We will start by giving the proof and a couple of examples. Then we
describe how some interesting generalizations of the lemma seem to be possible, including a proper
categorical setting.