This page hosts information on Peter Krautzberger's talk "What is … an ultrafilter?" at the "What is …?" seminar.
Where & When
Friday, June 8, 2018, 2.30pm @ TU MA 415
NOTE: the 10th anniversary will start already at 2.00pm (sharp!) and end around 6.00pm at latest. The talk itself may start a bit later than 2.30pm if the preceding quiz lasts longer than planned.
A historic re-enactment of the very first "What is …?" talk, 0% fewer mistakes guaranteed.
We'll introduce the basic notions for ultrafilters, discuss fundamental examples and properties and, if time permits, build a simple model of hyperreals.