[PHK_seminar] [Cohomology]Wednesday 26 Nov, Roman Golovko

[Petr Somberg]

 This is a gentle remainder of our seminar starting soon!

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> Cohomology in algebra, geometry, physics and statistics
> Wednesday, 26 November 2025 - 13:30 to 14:30
> Place: Institute of Mathematics of ASCR, Žitná 25, Praha 1, the  blue
> lecture  room  + ZOOM meeting
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> Speaker: Roman Golovko, Charles University
> Title: Non-regular Lagrangian concordances between Legendrian knots
> Abstract
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> For a while, it was an open question whether a Lagrangian cobordism with
> a non-empty positive end can be decomposed into a concatenation of
> elementary pieces:
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> traces of Legendrian isotopies, isolated standard-unknot births inducing
> Lagrangian 0-handle attachments, and Legendrian surgeries inducing
> Lagrangian 1-handle
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> attachments. We answer this question negatively. This is joint work with
> Georgios Dimitroglou Rizell.
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> We shall open  the seminar room  and  ZOOM meeting at 13.15 for (virtual)
> coffee and close ZOOM at 15.00
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> Join Zoom Meeting
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> https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRUT09
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> Meeting ID:99598413922
> Passcode:Galois
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> For more information see the seminar web page at
> https://www.math.cas.cz/index.php/events/seminar/16
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> Cohomology in algebra, geometry, physics and statistics mailing list
> phk_seminar at math.cas.cz
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