YSTW2015: Saharon Shelah is telling a joke..:

https://www.youtube.com/watch?v=xw64U2xjtw8&t=1782

Wednesday seminar

Dear all, The seminar meets on Wednesday June 27th at 11:00 in the Institute of Mathematics CAS, Zitna 25, seminar room, 3rd floor, front building. Jindra Zapletal will present a talk. Best, David ...

https://settheory.mathtalks.org/wednesday-seminar-25/

Ilya Shapirovsky: Locally finite varieties of modal algebras

Place: Fields Institute (Room 210) Date: June 15, 2018 (13:30-15:00) Speaker: Ilya Shapirovsky Title: Locally finite varieties of modal algebras Abstract: A modal algebra is a Boolean algebra enriched with an additive operation. Equational theories of modal algebras are called modal logics. A logic L is said to be n-tabular if, up to th ...

https://settheory.mathtalks.org/ilya-shapirovsky-locally-finite-varieties-of-modal-algebras/

Wednesday seminar

Dear all, The seminar meets on Wednesday June 20th at 11:00 in the Institute of Mathematics CAS, Zitna 25, seminar room, 3rd floor, front building. Program: Mirna Džamonja -- Higher order versions of the logic of chains close First order logic of chains was discovered by Carol Karp and revisited in recent work of Dz.… ...

https://settheory.mathtalks.org/wednesday-seminar-24/

Zoltán Vidnyánszky: Borel chromatic numbers: finite vs infinite

KGRC Research Seminar - 2017-06-08 at 4pm. Speaker: Zoltán Vidnyánszky (York University, Toronto, Canada) Abstract: One of the most interesting results of Borel graph combinatorics is the $G_0$ dichotomy, i. e., the fact that a Borel graph has uncountable Borel chromatic number if and only if it contains a Borel homomorphic imag ...

https://settheory.mathtalks.org/zoltan-vidnyanszky-borel-chromatic-numbers-finite-vs-infinite/

Zoltán Vidnyánszky: Anti-basis results for graphs of infinite Borel chromatic number

Place: Fields Institute (Room 210) Date: March 24, 2017 (13:30-15:00) Speaker: Zoltán Vidnyánszky, York University Title: Anti-basis results for graphs of infinite Borel chromatic number Abstract: One of the most interesting results of Borel graph combinatorics is the $G_0$ dichotomy, ...

https://settheory.mathtalks.org/zoltan-vidnyanszky-anti-basis-results-for-graphs-of-infinite-borel-chromatic-number/

Zoltan Vidnyanszky: Characterization of order types representable by Baire class 1 functions

Place: Fields Institute (Room 210) Date: September 30th, 2016 (13:30-15:00) Speaker: Zoltan, Vidnyanszky, York University Title: Characterization of order types representable by Baire class 1 functions Abstract: Let $\mathcal{F}$ be a family of real valued functions on a Polis ...

https://settheory.mathtalks.org/zoltan-vidnyanszky-characterization-of-order-types-representable-by-baire-class-1-functions/

4th European Set Theory Conference, July 15 - 18, 2013

The 4th European Set Theory Conference will be held in Mon St Benet, near Barcelona, on 15-18 July 2013. Mostowski lecture: Adam Krawczyk (Warsaw): Andrzej Mostowski Centenary. Hausdorff Medal lecture: Hugh Woodin Tutorials: Moti Gitik (Tel Aviv): Forcing and cardinal arithmetic Plenary lectures: Laura Fontanella Menachem Magidor Michael Rathjen John Ste ...

https://settheory.mathtalks.org/4th-european-set-theory-conference-july-15-18-2013/

Joshua Brot, Mengyang Cao, David J. Fernández-Bretón: Finiteness classes arising from Ramsey-theoretic statements in set theory without choice

Thursday, June 14, 2018, from 4 to 5:30pm East Hall, room 4096 Speaker: Joshua Brot, Mengyang Cao, David J. Fernández-Bretón (University of Michigan) Title: Finiteness classes ...

https://settheory.mathtalks.org/joshua-brot-mengyang-cao-david-j-fernandez-breton-finiteness-classes-arising-from-ramsey-theoretic-statements-in-set-theory-without-choice/

Zoltán Vidnyánszky - Borel chromatic numbers: basis and antibasis results

Talk held by Zoltán Vidnyánszky (KGRC) at the KGRC seminar on 2018-06-14. Abstract: We give a full description of the existence of a homomorphism basis for Borel graphs of given Borel chromatic number. In particular, we show that there is a Borel graph with Borel chromatic number 3 that admits a homomorphism to ...

https://settheory.mathtalks.org/zoltan-vidnyanszky-borel-chromatic-numbers-basis-and-antibasis-results/

Andrea Vac: Embedding C*-algebras into the Calkin algebra

Place: Bahen Centre Information (Room BA 2165) Date: June 8, 2018 (13:30-15:00) Speaker: Andrea Vac Title: Embedding C*-algebras into the Calkin algebra Abstract: Given a separable Hilbert space H, the Calkin algebra is the quotient C(H) = B(H)/K(H), B(H) being the algebra of all linear continuous operators from H into itself, and K(H) the cl ...

https://settheory.mathtalks.org/andrea-vac-embedding-c-algebras-into-the-calkin-algebra/

Andrea Medini - Homogeneous spaces and Wadge theory

Talk held by Andrea Medini (KGRC) at the KGRC seminar on 2018-06-07. Abstract: All spaces are assumed to be separable and metrizable. A space $X$ is <em>homogeneous</em> if for all $x,y\in X$ there exists a homeomorphism $h:X\longrightarrow X$ such that $h(x)=y$. A space $X$ is <em>strongly homogeneous</em> if all non-empty clopen su ...

https://settheory.mathtalks.org/andrea-medini-homogeneous-spaces-and-wadge-theory/

Vera Trnkova

Dear all, I regret to inform you that Věra Trnková passed away on Sunday May 27th. The memorial service will be held on Wednesday June 6th at 9:20 in Strasnice. David ...

https://settheory.mathtalks.org/vera-trnkova/

Viera Šottová: Ideal version of selection principle S1(P,R)

The seminar meets on Wednesday June 6t at 11:00 in the Institute of Mathematics CAS, Zitna 25, seminar room, 3rd floor, front building. Program: Viera Šottová -- Ideal version of selection principle S1(P,R) Abstract attached. ...

https://settheory.mathtalks.org/viera-sottova-ideal-version-of-selection-principle-s1pr/

Very Informal European Gathering, Bristol (England), 8-9 Jun 2018

The VIEG - 2018 will be held on Friday-Saturday June 8-9th 2018 at the School of Mathematics, University of Bristol. Invited participants include: David Aspero (UEA) Raffaela Cutolo (Naples) Mirna Dzamonja (UEA) Martin Goldstern (TU Vienna) Asaf Karagila (UEA) Benedikt Löwe (Hamburg, ILLC Amsterdam) Charles Morgan (Bristol) For mor ...

https://settheory.mathtalks.org/very-informal-european-gathering-bristol-england-8-9-jun-2018/

Mikołaj Krupski: The functional tightness of infinite products

Place: Bahen Centre (BA 2165) Date: June 1, 2018 (13:30-15:00) Speaker: Mikołaj Krupski Title: The functional tightness of infinite products Abstract: The functional tightness $t_0(X)$ of a space $X$ is a cardinal invariant related to both the tightness $t(X)$ and the density character $d(X)$ of $X$. While the tightness $t(X)$ me ...

https://settheory.mathtalks.org/mikolaj-krupski-the-functional-tightness-of-infinite-products/

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 (Vienn ...

https://settheory.mathtalks.org/settop-2018-novi-sad-conference-in-set-theory-and-general-topology-novi-sad-july-2-5-2018/

Martin Goldstern: Higher Random Reals

HUJI Logic Seminar Tuesday 29/5 13:30-15:00 Ross 63 Title: Higher Random Reals Speaker: Martin Goldstern Abstract: The set of real numbers is often identified with Cantor Space 2^omega, with which it shares many important properties: not only the cardinality, but also other "cardinal characteristics" such as cov(null), the smallest number of measure zero sets needed to cover… ...

https://settheory.mathtalks.org/martin-goldstern-higher-random-reals/

Otmar Spinas: Why Silver is special

Place: Bahen Center BA6183 Date: May 25, 2018 (13:30-15:00) Speaker: Otmar Spinas Title: Why Silver is special Abstract: I will try to give some insight into the challenging combinatorics of two amoeba forcings, one for Sacks forcing, the other one for Silver forcing. They can be used two obtain some new consistencies of inequalities between the additivity and… ...

https://settheory.mathtalks.org/otmar-spinas-why-silver-is-special/

Borisha Kuzeljevic - P-ideal dichotomy and some versions of the Souslin Hypothesis

Talk held by Borisha Kuzeljevic (Czech Academy of Sciences, Prague) at the KGRC seminar on 2018-05-24. Abstract: The talk will be about the relationship of PID with the statement that all Aronszajn trees are special. This is joint work with Stevo Todorcevic. ...

https://settheory.mathtalks.org/borisha-kuzeljevic-p-ideal-dichotomy-and-some-versions-of-the-souslin-hypothesis/

CMU math logic seminar, Tue 22 May, Fernández-Bretón on "Variations and analogs of Hindman's theorem"

...

https://settheory.mathtalks.org/cmu-math-logic-seminar-tue-22-may-fernandez-breton-on-variations-and-analogs-of-hindmans-theorem/