Georgios Dimitroglou Rizell (Uppsala University) : Non-regular concordances between stabilised Legendrian knots.

Please note this event occurred in the past.
September 25, 2026 2:30 pm - 3:30 pm ET
Seminars,
5 College Geometry and Topology Seminar
Georgios Dimitroglou Rizell
LGRT 1681

Non-regular concordances between stabilised Legendrian knots.

Abstract: We discuss a flexibility result that makes it possible to approximate totally real concordances in the symplectisation by Lagrangian concordances, after adding sufficiently many stabilisations of both signs to the Legendrians knots. The main application is the construction of Lagrangian concordances that are not regular in the sense of Eliashberg, and not even ribbon. This is joint work with R. Golovko.