[PHK_seminar] [Cohomology]Wednesday 25 Mar, Aaron Kettner]

[Igor Khavkine]

Dear All,

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

   https://youtu.be/FXzm0MrePdc

The link has also been recorded at the ResearchSeminars announcement

   https://researchseminars.org/talk/PHK-cohomology-seminar/159/

Best,

Igor

On 3/25/26 12:20 PM, Petr Somberg via phk_seminar wrote:
> 
>   This is just a gentle remainder of our seminar!
> 
> --------------------------------------------------------------------------
> 
> 
> 
> 
>       Cohomology in algebra, geometry, physics and statistics
> 
> 
> 
> 
>           Wednesday, 25 March 2026 - 13:30 to 14:30
> 
>           Place: Institute of Mathematics of ASCR, Žitná 25, Praha 1, the
> blue lecture  room + ZOOM meeting
> 
> 
> 
> 
>           Speaker: Aaron Kettner, Mathematical Institute, Charles University
> 
>           Title: $K$-theory for the $C^*$-algebra of a homeomorphism and a
> vector bundle
> 
> 
> 
>           Abstract
> 
> 
> We outline how to construct a C*-algebra from a homeomorphism on a
> 
>   compact Hausdorff space $X$, together with a vector bundle over $X$.
> 
>   This generalizes crossed products of the form
> 
>   $C(X)\rtimes_\alpha\mathbb{Z}$. Under reasonable assumptions these
> 
>   $C^*$-algebras turn out to be classifiable in the sense of the Elliott
> 
>   program. We sketch K-theory calculations which are work in progress with
> 
>   Karen Strung and Sven Raum.
> 
> 
> 
> 
> 
> 
> 
> ----------------------------------------------
> 
> 
> We shall open the seminar room +  ZOOM meeting at 13.15 for  coffee and
> close ZOOM at 15.00
> 
> 
> Join Zoom Meeting
> 
> 
> https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09
> 
> 
> Meeting ID:99598413922
> Passcode:Galois
> 
> 
> --------------------------------------------------
> On Wednesday April 1,   Elizaveta Vishnyakova  sahll give a talk
>    About Graded coverings of supermanifolds and their applications
> 
> The seminar   shall     start  earlier  at   13:00.
> 
> 
> 
> 
> 
>            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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