[PHK_seminar] [Cohomology]Wednesday 13 Mar, Vladimir Chernov

[Igor Khavkine]

Dear All,

The video recording of the talk by Vladimir Chernov from this week is 
now available on YouTube at

   https://youtu.be/OukKZKs_h7g

The link has also been recorded at the ResearchSeminars announcement

   https://researchseminars.org/talk/PHK-cohomology-seminar/98/

Best,

Igor

On 3/11/24 14:00, sender of seminar announcement via phk_seminar wrote:
> Wednesday, 13 March 2024 - 15:00 to 16:00
> Place: ZOOM meeting
> 
> Speaker: Vladimir Chernov, Dartmouth College
> Title: Virtual Legendrian knots and possible relations to causality in 
> Borde–Sorkin spacetimes
> 
> Abstract
> 
> We review our results with Stefan Nemirovski on the relation
> 
> of Legendrian linking and causal structure in globally hyperbolic
> 
> spacetimes. After that we discuss virtual Legendrian knots defined as
> 
> Legendrian knots in ST^∗M studied up to isotopy and modification of
> 
> ST^∗M induced by surgery on M that were introduced by Patricia Cahn
> 
> and Asa Levi. We formulate a few conjectures about them and
> 
> conjecturally relate them to causality in Borde–Sorkin spacetimes that
> 
> are manifolds with a Lorentz metric that is degenerate at critical
> 
> points of a Morse "timelike" function and that consist of globally
> 
> hyperbolic pieces between critical levels. We prove these conjectures
> 
> for 2+1 dimensional Borde–Sorkin spacetimes.
> 
> The talk is based on the joint work with Rustam Sadykov.
> 
> -----------------------------------------------------------------------------------------------------------------------
> 
> We shall open  ZOOM at 14.45 for virtual coffee
> 
> Join Zoom Meeting
> 
> https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09 <https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09>
> 
> 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
> 
> 
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