Recent and upcoming talks by Chris Lambie-Hanson

Chris Lambie-Hanson: Squares, ascent paths, and chain conditions

BIU seminar in Set Theory On 06/11/2017, 13-15, Building 505, Room 65 Speaker: Chris Lambie-Hanson Title: Squares, ascent paths, and chain conditions Abstract. Two topics of interest in modern set theory are the productivity of chain conditions and the existence of higher Aronszajn trees. continue reading…

MAMLS Logic Friday, New York, October 27, 2017

Mid-Atlantic Mathematical Logic Seminar CUNY Graduate Center October 27, 2017 Room 6417 MAMLS Logic Friday is a one-day logic meeting taking place at the CUNY Graduate Center with the support of the National Science Foundation. continue reading…

Chris Lambie-Hanson: A forcing axiom deciding the generalized Souslin Hypothesis

Mathematical logic seminar – Oct 3 2017 Time:     3:30pm – 4:30 pm Room:     Wean Hall 8220 Speaker:         Chris Lambie-Hanson Department of Mathematics Bar-Ilan University Title:     A forcing axiom deciding the generalized Souslin Hypothesis Abstract: Given a regular, uncountable cardinal $\kappa$, it is often desirable to be able to construct objects of size $\kappa^+$ using approximations of size less than $\kappa$. continue reading…

Set Theory, Model Theory and Applications (In memory of Mati Rubin), Eilat, April 22-26, 2018

RESEARCH WORKSHOP OF THE ISRAEL SCIENCE FOUNDATION Set Theory, Model Theory and Applications (In memory of Mati Rubin)   The international conference “Set Theory, Model Theory and Applications,” in memory of our late colleague Mati Rubin, will take place at the Eilat Campus of Ben-Gurion University of the Negev (Israel) from 22 – 26 April, 2018. continue reading…

Chris Lambie-Hanson: Constructions from square and diamond, with an application to super-Souslin trees

Monday, May 8, 2017, 16.30 Seminar room 0.011, Mathematical Institute, University of Bonn Speaker: Chris Lambie-Hanson (Bar-Ilan) Title: Constructions from square and diamond, with an application to super-Souslin trees Abstract. In 1982, Shelah and Stanley proved that, if $\kappa$ is a regular, infinite cardinal, $2^\kappa = \kappa^+$, and there is a $(\kappa^+, 1)$-morass, then there is a $\kappa^{++}$-super-Souslin tree, which is a type of normal $\kappa^{++}$-tree that necessarily has a $\kappa^{++}$-Souslin subtree and continues to do so in any outer model in which $\kappa^{++}$ is preserved and no new subsets of $\kappa$ are present. continue reading…

Chris Lambie-Hanson: Partition relations and generalized scattered orders

BIU seminar in Set Theory On 30/03/2017, 10-12, Building 604, Room 103 Speaker: Chris Lambie-Hanson Title: Partition relations and generalized scattered orders Abstract: The class of scattered linear orders, isolated by Hausdorff, plays a prominent role in the study of general linear orders. continue reading…

Chris Lambie-Hanson: Trees with ascent paths

HUJI Logic Seminar  The next meeting of the Logic Seminar will be in Wednesday, 22/03/17, 16:00 – 18:00, Ross buiding. Speaker: Chris Lambie-Hanson Title: Reflections on the coloring and chromatic numbers Abstract: The notion of an ascent path through a tree, isolated by Laver, is a generalization of the notion of a cofinal branch and, in many cases, the existence of an ascent path through a tree provides a concrete obstruction to the tree being special. continue reading…

Chris Lambie-Hanson: Reflections on the coloring and chromatic numbers

HUJI Logic Seminar  The next meeting of the Logic Seminar will be in Wednesday, 18/01, 16:00 – 18:00, Ross 70. Speaker: Chris Lambie-Hanson Title: Reflections on the coloring and chromatic numbers Abstract: Compactness phenomena play a central role in modern set theory, and the investigation of compactness and incompactness for the coloring and chromatic numbers of graphs has been a thriving area of research since the mid-20th century,when De Bruijn and Erdős published their compactness theorem for finite chromatic numbers. continue reading…

2016 Graduate summer school in set theory, Irvine, July 25 – August 5 2016

A graduate summer school in set theory will be held July 25 – August 5 2016 at the University of California Irvine. The subject of the summer school will be singular cardinal combinatorics, with a focus on PCF theory. continue reading…

Chris Lambie-Hanson: Coloring classes and the Hanf number for amalgamation.

Set Theory and Topology seminar (BGU)  Notice the one-time change in place to +201. Time: Tuesday, March 24, 12:15-13:40. Place: Seminar room +201, Math building 58. Speaker: Chris Lambie-Hanson (HUJI). Title: Coloring classes and the Hanf number for amalgamation. continue reading…