[PHK_seminar] [Cohomology]Wednesday 12 Nov, Yaroslav Bazaikin]

[Petr Somberg]

 This is a gentle remainder of our seminar starting soon!

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     Cohomology in algebra, geometry, physics and statistics




         Wednesday, 12 November 2025 - 13:30 to 14:30

         Place: Institute of Mathematics of ASCR, Žitná 25, Praha 1, the 
blue lecture  room  +ZOOM meeting




         Speaker: Yaroslav  Bazaikin, The Jan Evangelista Purkyně
University in Ústí nad Labem

         Title: On Losik characteristic classes of quotient of $S^1$ by
special linear transformations



         Abstract


We study Chern-Losik and Godbillon-Vey-Losik classes of quotient
$S^1/\varphi$, where $\varphi \in SL(2,\mathbb{R})$.

These classes arise geometrically as invariants of foliated suspensions
over action $\varphi on $S^1$. This is joint work

with Anton Galaev and Yury Efremenko.
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We shall open  the seminar room  + ZOOM meeting at 13.15 for (virtual)
coffee and close ZOOM at 15.00


Join Zoom Meeting


https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09


Meeting ID:99598413922
Passcode:Galois


 For more information, see the seminar web page at
 https://www.math.cas.cz/index.php/events/seminar/16











          For more information see the seminar web page at

          https://www.math.cas.cz/index.php/events/seminar/16




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