[PHK_seminar] [Cohomology]Wednesday 20 Nov, Anton Galaev

[Igor Khavkine]

Dear All,

The video recording of the talk by Anton Galaev from last week is now 
available on YouTube at

   https://youtu.be/H22vO0RaFcs

The slides are available from

  
https://users.math.cas.cz/~hvle/PHK/Galaev_conformally_homogeneous_2024.pdf

These links have also been recorded at the ResearchSeminars announcement

   https://researchseminars.org/talk/PHK-cohomology-seminar/115/

Best,

Igor

On 11/18/24 1:00 PM, sender of seminar announcement via phk_seminar wrote:
> Wednesday, 20 November 2024 - 13:30 to 14:30
> Place: ZOOM meeting
> 
> Speaker: Anton Galaev, University of Hradec Kralove
> Title: Conformally homogeneous Lorentzian spaces
> 
> Abstract
> 
> This is a joint work with Dmitri Alekseevsky. We prove that if a simply 
> connected non-conformally flat conformal Lorentzian manifold (M,c) 
> admits an essential transitive group of conformal transformations, then 
> there exists a metric g∈c such that (M,g) is a complete homogeneous 
> plane wave. We also prove that the group of conformal transformations of 
> a non-conformally flat simply connected homogeneous plane wave (M,g) 
> consists of homotheties, hence it is a 1-dimensional extension of the 
> group of isometries.
> 
> 
> --------------------------------------------------------------
> 
> We shall open the ZOOM at 13.15 for coffee and close the room at 15:00
> 
> 
> Join Zoom Meeting
> 
> 
> https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRU 
> <https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09>9
> 
> 
> MeetingID:99598413922
> 
> 
> Passcode:Galois
> 
> For more information see the seminar web page at
> https://www.math.cas.cz/index.php/events/seminar/16
> 
> Cohomology in algebra, geometry, physics and statistics mailing list
> phk_seminar at math.cas.cz
> https://list.math.cas.cz/listinfo/phk_seminar@math.cas.cz
> 
> 
> _______________________________________________
> phk_seminar mailing list
> phk_seminar at math.cas.cz
> https://list.math.cas.cz/listinfo/phk_seminar