Recent and upcoming talks by Jing Zhang

Jing Zhang: How to get the brightest rainbows from the darkest colorings

Mathematical logic seminar – Sep 18 2018 Time:     3:30pm – 4:30 pm Room:     Wean Hall 8220 Speaker:         Jing Zhang Department of Mathematical Sciences CMU Title:     How to get the brightest rainbows from the darkest colorings Abstract: We will discuss the rainbow (sometimes called polychromatic) variation of the Ramsey theorem on uncountable cardinals. 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…

Jing Zhang: Rado’s Conjecture and its Baire Version II

Mathematical logic seminar – Jan 30 2018 Time:     3:30pm – 4:30 pm Room:     Wean Hall 8220 Speaker:         Jing Zhang Department of Mathematical Sciences CMU Title:     Rado’s Conjecture and its Baire Version II Abstract: Rado’s Conjecture is a reflection/compactness principle formulated by Todorčević, who also showed its consistency relative to the existence of strongly compact cardinals. continue reading…

Jing Zhang: Rado’s Conjecture and its Baire Version

Mathematical logic seminar – Jan 23 2018 Time:     3:30pm – 4:30 pmRoom:     Wean Hall 8220 Speaker:         Jing Zhang Department of Mathematical Sciences CMU Title:     Rado’s Conjecture and its Baire Version Abstract: Rado’s Conjecture is a reflection/compactness principle formulated by Todorčević, who also showed its consistency relative to the existence of strongly compact cardinals. continue reading…

Jing Zhang: A polarized partition theorem for large saturated linear orders

Mathematical logic seminar – Mar 28 2017 Time:     3:30pm – 4:30 pm Room:     Wean Hall 8220 Speaker:         Jing Zhang Department of Mathematical Sciences CMU Title:     A polarized partition theorem for large saturated linear orders Abstract:     Laver proved the following polarized partition theorem for rational numbers: for any natural number d, any finite coloring f of Q^d, there exist subsets of Q, X_i for i < d, each of which has the same order type as Q such that the product X_1 x … x X_{d-1} gets at most d! continue reading…

Jing Zhang: The forcing proof of the Halpern-Läuchli theorem

Mathematical logic seminar – February 23 2016 Time:     12:30 – 13:30 Room:     Wean Hall 8220 Speaker:         Jing Zhang Department of Mathematical Sciences CMU Title:     The forcing proof of the Halpern-Läuchli theorem Abstract: We will discuss Harrington’s conceptually simple proof of the Halpern-Läuchli theorem using the machinery of forcing. continue reading…