[PHK_seminar] [Cohomology]Wednesday 26 Feb, Vsevolod Shevchishin]

[Petr Somberg]

 This is just a gentle reminder of our seminar starting soon.

--------------------------------------------------------------------------

     Cohomology in algebra, geometry, physics and statistics




         Wednesday, 26 February 2025 - 13:30 to 14:30

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




         Speaker: Vsevolod Shevchishin, University of Warmia and Mazury at
Olsztyn

         Title: Laemotentoma: Treating of symplectic neck stretching in
symplectic 4-manifolds across Lagrangian surfaces



         Abstract


Recently Borman-Li-Wu found an example of two Lagrangian embeddings

of the real projective plane RP^2 in a symplectic 4-manifold

which are Z_2-homologous but not isotopic, even smoothly.




In my talk I make a short introduction to the technique

of the symplectic neck stretching ("Laemotentoma")

and show how it can be used to classify Lagrangian embeddings

of RP^2 in symplectic 4-manifolds. In particular, I show that

for any given number N there exist a rational symplectic 4-manifold

X and Lagrangian embeddings P_1, ..., P_N of RP^2 in X

in the same Z_2-homology class which are pairwisely not isotopic, even
smoothly.

--------------------------------------------------------------------------------------------------------------------------



We shall open  the seminar room at 13.15 for coffee and close  the room at
15:00


Join Zoom Meeting


https://cesnet.zoom.us/j/99598413922?pwd=YXNFbk50aVhleXhWSGtISFViLytRU9


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





 _______________________________________________
phk_seminar mailing list
phk_seminar at math.cas.cz
https://list.math.cas.cz/listinfo/phk_seminar