Recent and upcoming talks by Paul Ellis

Paul Ellis – Cycle Reversions and Dichromatic Number in (Infinite) Tournaments

KGRC seminar on 2017-11-16 at 3:30pm Speaker: Paul Ellis (Manhattanville College, New York, USA) Abstract: The dichomatic number for a digraph is the least number of acyclic subgraphs needed to cover the graph. continue reading…

BEST 2016 slides

The 23rd BEST conference was held June 15–16 in San Diego, CA. Shehzad Ahmed – Jonsson cardinals and pcf theory Liljana Babinkostova – A weakening of the closure operator Kyle Beserra – On the conjugacy problem for automorphisms of countable regular trees Erin Carmody – Killing them softly William Chan – Every analytic equivalence relation with all Borel classes is Borel somewhere John Clemens – Relative primeness of equivalence relations Paul Corazza – The axiom of infinity, quantum field theory, and large cardinals Cody Dance – Indiscernibles for $L[T_2,x]$ Natasha Dobrinen – Ramsey spaces coding universal triangle-free graphs and applications to Ramsey degrees Paul Ellis – A Borel amalgamation property Monroe Eskew – Rigid ideals Daniel Hathaway – Disjoint Borel functions Jared Holshouser – Partition properties for non-ordinal sets under the axiom of determinacy Paul McKenney – Automorphisms of $\mathcal P(\lambda)/\mathcal I_\kappa Kaethe Minden – Subcomplete forcing and trees Daniel Soukup – Orientations of graphs with uncountable chromatic number Simon Thomas – The isomorphism and bi-embeddability relations for finitely generated groups Douglas Ulrich – A new notion of cardinality for countable first order theories Kameryn Williams – Minimal models of Kelley-Morse set theory Martin Zeman – Master conditions from huge embeddings 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…