Recent and upcoming talks by Harry Altman

Special session on Large cardinals and combinatorial set theory, Ann Arbor, October 20-21, 2018

Paul Larson and Andrés E Caicedo are co-organizing a special session at the Fall Central Sectional Meeting 2018 in Ann Arbor, on Large cardinals and combinatorial set theory. The session will take place Saturday October 20 and Sunday October 21. continue reading…

Harry Altman: Lower sets in products of well-ordered sets and related WPOs

Thursday, May 24, 2018, from 4 to 5:30pm East Hall, room 4096 Speaker: Harry Altman (University of Michigan) Title: Lower sets in products of well-ordered sets and related WPOs Abstract: Following last week’s talk on maximum order types of well partial orders, we’ll compute the maximum order type of the set of bounded lower sets in N^m, as well as generalizations to finite products of other well-ordered sets, and discuss the maximum order types of some other related well partial orders also. continue reading…

Harry Altman: Well partial orderings and their maximum extending ordinals

Thursday, May 17, 2018, from 4 to 5:30pm East Hall, room 4096 Speaker: Harry Altman (University of Michigan) Title: Well partial orderings and their maximum extending ordinals Abstract: A well partial order is a partial order all of whose extensions to a total order are well-orders. continue reading…