Difference between revisions of "Graduate Logic Seminar"
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=== November 9 - Karthik Ravishankar === | === November 9 - Karthik Ravishankar === | ||
− | Title, | + | Title: Elementary submodels in infinite combinatorics |
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+ | Abstract: The usage of elementary submodels is a simple but powerful method to prove theorems, or to simplify proofs in infinite combinatorics. In the first part of the talk, we quickly cover the basic concepts involved for proving results using elementary submodels, and move on to provide two examples of application of the technique to prove two popular results from set theory: The Delta System lemma and the Fodors Pressing down lemma . We provide both the classical proof as well as a proof using elementary submodels to contrast the two approaches. | ||
=== November 16 - Karthik Ravishankar === | === November 16 - Karthik Ravishankar === |
Revision as of 19:41, 8 November 2020
The Graduate Logic Seminar is an informal space where graduate students and professors present topics related to logic which are not necessarily original or completed work. This is a space focused principally on practicing presentation skills or learning materials that are not usually presented in a class.
- When: Mondays 4p-5p
- Where: on line (ask for code).
- Organizers: Jun Le Goh
The talk schedule is arranged at the beginning of each semester. If you would like to participate, please contact one of the organizers.
Sign up for the graduate logic seminar mailing list: join-grad-logic-sem@lists.wisc.edu
Contents
- 1 Fall 2020 - Tentative schedule
- 1.1 September 14 - Josiah Jacobsen-Grocott
- 1.2 September 28 - James Hanson
- 1.3 October 5 - Tejas Bhojraj from 3:30PM-4:00PM
- 1.4 November 9 - Karthik Ravishankar
- 1.5 November 16 - Karthik Ravishankar
- 1.6 Tuesday, November 24 - Tonicha Crook (Swansea University) from 9:00AM-10:00AM
- 1.7 November 30 - Yvette Ren
- 2 Previous Years
Fall 2020 - Tentative schedule
September 14 - Josiah Jacobsen-Grocott
Title: Degrees of points in topological spaces
Abstract: An overview of some results from Takayuki Kihara, Keng Meng Ng, and Arno Pauly in their paper Enumeration Degrees and Non-Metrizable Topology. We will look at a range of topological spaces and the corresponding classes in the enumeration degrees as well as ways in which we can distinguish the type of classes using the separation axioms.
September 28 - James Hanson
Title: The Semilattice of Definable Sets in Continuous Logic
Abstract: After an analysis-free exposition of definable sets in continuous logic, we will present a fun, illustrated proof that any finite bounded lattice can be the poset of definable subsets of $S_1(T)$ for a continuous theory $T$.
October 5 - Tejas Bhojraj from 3:30PM-4:00PM
Title: A Levin-Schnorr type result for Weak Solovay random states.
Abstract: We look at the initial-segment complexity of Weak Solovay quantum random states using MK, a prefix-free version of quantum Kolmogorov complexity. The statement of our result is similar to the Levin-Schnorr theorem in classical algorithmic randomness.
November 9 - Karthik Ravishankar
Title: Elementary submodels in infinite combinatorics
Abstract: The usage of elementary submodels is a simple but powerful method to prove theorems, or to simplify proofs in infinite combinatorics. In the first part of the talk, we quickly cover the basic concepts involved for proving results using elementary submodels, and move on to provide two examples of application of the technique to prove two popular results from set theory: The Delta System lemma and the Fodors Pressing down lemma . We provide both the classical proof as well as a proof using elementary submodels to contrast the two approaches.
November 16 - Karthik Ravishankar
Title, abstract TBA
Tuesday, November 24 - Tonicha Crook (Swansea University) from 9:00AM-10:00AM
Title, abstract TBA
November 30 - Yvette Ren
Title, abstract TBA
Previous Years
The schedule of talks from past semesters can be found here.