[PHK_seminar] [Cohomology]Wednesday 14 Oct, Katharina Neusser]

[Petr Somberg]

 This is just our usual gentle reminder of the seminar starting in one hour.

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     Cohomology in algebra, geometry, physics and statistics




         Wednesday, 14 October 2026 - 13:30 to 14:30

         Place: Institute of Mathematics of ASCR, Žitná 25, Praha 1,  
ZOOM meeting




         Speaker: Katharina Neusser, Masaryk University

         Title: Geometry of conic connections



         Abstract


A conestructure on a complex manifold $M$ is given by a closed submanifold
$\mathcal C\subset \mathbb P TM$ of the projectived tangent bundle of $M$
which is submersive over $M$. Such geometric structures arise naturally in
differential and algebraic geometry and, when they do, they are often
equipped with a conic connection which specifies a distinguished family of
curves on $M$ in directions of $\mathcal C$. A classical example is the
null cone bundle of a holomorphic conformal structure equipped with the
conic connection induced by the null-geodesics. In a joint work with
Jun-Muk Hwang we defined an important local invariant for so-called
characteristic conic connections, namely the cubic torsion. In this talk I
will give a geometric interpretation of the cubic torsion and will discuss
some applications. This talk is based on a joint work with Andreas Cap.

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We shall open the seminar room and ZOOM meeting at 13.15 for coffee and
close ZOOM at 15.30

Join Zoom Meeting

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

Meeting ID:99598413922











          For more information see the seminar web page at

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




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