[Settfa] RESCHEDULED: Seminar Tuesday 5 Mar, Rob Sullivan

[David Bradley-Williams]

Dear all,

There is some good news: Rob has fortunately recovered enough from the 
illness that caused him to miss his original flight yesterday and today 
resolve travel issues to allow him to nevertheless arrive in time for 
his talk as originally planned. So we are now glad to RESCHEDULE his 
talk for the SAME TIME and place, tomorrow (Tuesday) morning:

>> Tuesday, 5 March 2024 - 10:00 to 11:30
>> Place: IM, konírna
>> 
>> Speaker: Rob Sullivan, Universität Münster
>> Title: Generic embeddings into Fraïssé structures
>> 
>> Abstract
>> 
>> This project, in the writing-up stage, is work with A. Codenotti 
>> (Münster), A. Panagiotopoulos (Vienna) and J.Winkel.
>> 
>> 
>> Let M be a Fraïssé structure, and let A be a countably infinite 
>> structure which is embeddable in M. If M has free amalgamation, then 
>> there exists a Katetov embedding of A into M: an embedding such that 
>> each automorphism of A extends to an automorphism of M. Is this 
>> embedding "common" or "uncommon"?
>> 
>> 
>> To answer this, we investigate generic embeddings of A into M. An 
>> embedding of A into M is said to be generic if it lies in a comeagre 
>> set inside the Polish space Emb(A, M).

Looking forward to seeing everyone that can still make it!

All the best,

David

On 2024-03-04 10:05, Wieslaw Kubis wrote:
> Dear all,
> 
> Unfortunately we have to cancel tomorrow's seminar, the speaker got
> sick and cannot come.
> 
> All the best,
> 
> Wieslaw
> 
> 
> 
> 
> Dne 02. 03. 24 v 9:00 kubis at math.cas.cz napsal(a):
>> Set Theory and Analysis
>> 
>> Tuesday, 5 March 2024 - 10:00 to 11:30
>> Place: IM, konírna
>> 
>> Speaker: Rob Sullivan, Universität Münster
>> Title: Generic embeddings into Fraïssé structures
>> 
>> Abstract
>> 
>> This project, in the writing-up stage, is work with A. Codenotti 
>> (Münster), A. Panagiotopoulos (Vienna) and J.Winkel.
>> 
>> 
>> Let M be a Fraïssé structure, and let A be a countably infinite 
>> structure which is embeddable in M. If M has free amalgamation, then 
>> there exists a Katetov embedding of A into M: an embedding such that 
>> each automorphism of A extends to an automorphism of M. Is this 
>> embedding "common" or "uncommon"?
>> 
>> 
>> To answer this, we investigate generic embeddings of A into M. An 
>> embedding of A into M is said to be generic if it lies in a comeagre 
>> set inside the Polish space Emb(A, M).
>> 
>> 
>> We will answer the following three questions:
>> 
>> 
>> - When are two embeddings of A into M generically isomorphic via an 
>> automorphism of M?
>> 
>> 
>> - When is A generically corigid (i.e. Aut(M/A) trivial)?
>> 
>> 
>> - Let g lie in Aut(A). When is g generically extensible to an 
>> automorphism of M?
>> 
>> 
>> We will also provide a wide range of examples in the context of these 
>> three questions.
>> 
>> For more information see the seminar web page at
>> https://www.math.cas.cz/index.php/events/seminar/6
>> 
>> Set Theory and Analysis mailing list
>> settfa at math.cas.cz
>> https://list.math.cas.cz/listinfo/settfa@math.cas.cz
>> 
>> 
>> _______________________________________________
>> Settfa mailing list
>> Settfa at math.cas.cz
>> https://list.math.cas.cz/listinfo/settfa
> _______________________________________________
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> https://list.math.cas.cz/listinfo/settfa

-- 
David Bradley-Williams PhD
Office 317
Institute of Mathematics, Czech Academy of Sciences
Žitná 25
115 67 Praha 1
Czech Republic

Tel: +420-222 090 743

Url: http://davidbw.sdf.org/