# Recent and upcoming talks by Bill Chen

## William Chen: ANTICHAINS, THE STICK PRINCIPLE, AND A MATCHING NUMBER

Place: Fields Institute (Library) Date:  September 2, 2018 (13:30-15:00) Speaker: William Chen Title: ANTICHAINS, THE STICK PRINCIPLE, AND A MATCHING NUMBER Abstract: This talk is about some cardinal invariants related to $\omega_1$. continue reading…

## Novi Sad Conference in Set Theory and General Topology, Novi Sad, July 2-5, 2018

The international conference “Novi Sad Conference in Set Theory and General Topology” SETTOP 2018 that will take place from July 2nd to July 5th 2018 in Novi Sad. Confirmed invited speakers: David Asperó (Norwich) David Chodounský (Prague) Natasha Dobrinen (Denver) Vera Fischer (Vienna) Heike Mildenberger (Freiburg) Dilip Raghavan (Singapore) Philip Schlicht (Bonn) Stevo Todorčević (Toronto / Paris) Program Committee: Joan Bagaria (Barcelona) Mirna Džamonja (Norwich) Sy David Friedman (Vienna) István Juhász (Budapest) Miloš Kurilić (Novi Sad) Participants can also present short talks. continue reading…

## Bill Chen: A small Dowker space

BIU seminar in Set Theory Speaker: Bill Chen (BGU) There will be two talks: November 27 and December 4. First talk: A small Dowker space, part 1 Abstract. A topological space is said to be “Dowker” if it is normal but its product with the unit interval is not normal. continue reading…

## Bill Chen: Variations of the stick principle

BGU seminar in Logic, Set Theory and Topology Time: Tuesday, June 27th, 12:15-13:30. Place: Seminar room -101, Math building 58. Speaker: Bill Chen (BGU) Title: Variations of the stick principle Abstract: The stick principle asserts that there is a family of infinite subsets of $\omega_1$ of size $\aleph_1$ so that any uncountable subset of $\omega_1$ has some member of the family as a subset. continue reading…

## Logic Colloquium 2017, Stockholm, August 14-20, 2017

The Logic Colloquium 2017 (LC2017) is the 2017 Annual European summer meeting of the Association for Symbolic Logic (ASL) and will be held during August 14-20, 2017 at the main campus of Stockholm University. continue reading…

## Bill Chen: Tight stationarity and pcf theory – part 2

BGU Seminar in Logic, Set Theory and Topology. Tomorrow we will resume our seminar in Logic, Set Theory and Topology. Time: Tuesday, November 15, 12:30-13:45. Place: Seminar room -101, Math building 58. continue reading…

## Bill Chen: Tight stationarity and pcf theory – part 1

BGU Seminar in Logic, Set Theory and Topology. Tomorrow we will resume our seminar in Logic, Set Theory and Topology. Time: Tuesday, November 8th, 12:30-13:45. Place: Seminar room -101, Math building 58. continue reading…

## Bill Chen: Can every mutually stationary sequence be tightly stationary?

Mathematical logic seminar – October 27, 2015 Time:     12:30 – 13:30 Room:     Wean Hall 7201 Speaker:         Bill Chen Department of Mathematics UCLA Title:     Can every mutually stationary sequence be tightly stationary? continue reading…

## BEST 2015 slides

The 22nd BEST conference was held June 14–17 in San Francisco, CA. Mirna Džamonja – FAC and WQO orders and their ordinal invariants Luke Serafin – Cardinal invariants of generalized continua Ari Brodsky – A microscopic approach to higher Suslin tree constructions Ola Kwiatkowska – Dynamics of the homeomorphism group of the Lelek fan Paul Ellis – The conjugacy problem for countable homogeneous structures Trevor Wilson – Covering properties of derived models Miha Habic – Joint Laver diamonds Bill Chen – Scales in Prikry extensions Rodrigo Dias – Productively countably tight spaces and selective games Steven Clontz – Limited information strategies in infinite games Liljana Babinkostova – The selective strong screen ability game Spencer Unger – Baire measurable paradoxical decompositions via matchings Diana Ojeda-Aristizábal – Finite forms of Gowers’ FINk theorem continue reading…

## 22nd Boise Extravaganza in Set Theory, June 15-17, 2015

Boise Extravaganza in Set Theory June 15 – 17, 2015 San Francisco State University math.boisestate.edu/~best/ At present plenary speakers for BEST 2015 include: Dr. Rodrigo Dias, University of Sao Paulo, Brazil Dr. continue reading…