# Recent and upcoming talks by Shehzad Ahmed

## 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…

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 $\mathcal P(\lambda)/\mathcal I_\kappa Kaethe Minden – Subcomplete forcing and trees Daniel Soukup – Orientations of graphs with uncountable chromatic number Simon Thomas – The isomorphism and bi-embeddability relations for finitely generated groups Douglas Ulrich – A new notion of cardinality for countable first order theories Kameryn Williams – Minimal models of Kelley-Morse set theory Martin Zeman – Master conditions from huge embeddings continue reading… ## Shehzad Ahmed: Jónsson successors of singular cardinals Wednesday, March 2 from 3 to 4pm Room: MB 124 Speaker: Shehzad Ahmed (Ohio University) Title: Jónsson successors of singular cardinals Abstract: We say that a cardinal$\lambda$is a Jónsson cardinal if it satisfies the following weak Ramsey-type property: given any coloring$F:[\lambda]^{<\omega}\to \lambda$of the finite subsets of$\lambda$in$\lambda$-many colors, there exists a set$H\in[\lambda]^\lambda$such that the range of$F\upharpoonright [H]^{<\omega}$is a proper subset of$\lambda$. continue reading… ## Shehzad Ahmed: Inner Model Theory II Boise Set Theory Seminar Monday, October 28 from 3-4pm Mathematics 136 Speaker: Shehzad Ahmed Title: Inner Model Theory II: Baby Mice Abstract: In this talk, we develop the relationship between$L$and$\mathcal{M}_0^\sharp$. continue reading… ## Shehzad Ahmed: Inner model theory Boise Set Theory Seminar Monday, October 21 from 3-4pm Room M 136 Speaker: Shehzad Ahmed (BSU) Title: Inner Model Theory I: Setting and Tools Abstract: This talk is the first in a sequence of talks, the purpose of which is to outline some of the motivations, tools, and themes of inner model theory. continue reading… ## Shezahd Ahmed: Extracting Measures from Strong Partition Cardinals Monday, September 9 from 3 to 4pm Room: TBA Speaker: Shehzad Ahmed Title: Extracting Measures from Strong Partition Cardinals Abstract: We say that a cardinal$\kappa$has the strong partition property if$\kappa\rightarrow(\kappa)^{\kappa}\$. continue reading…

Thursday, May 2 from 1:30 to 2:30pm Room B-309 Speaker: Shehzad Ahmed Title: Borel determinacy Abtract: We have seen various determinacy results throughout the semester, all of which have required large cardinal hypotheses. continue reading…

## Shehzad Ahmed: Analytic Determinacy II

Boise Set Theory Seminar Wednesday, March 13 from 4:30 to 5:30pm Room: MG-226 Speaker: Shehzad Ahmed Title: Analytic Determinacy from a measurable cardinal, II continue reading…