à 13h45, en visioconférence (zoom).
Ivan Smith (Cambridge)
Title: Lagrangian links in 4-manifolds
Abstract:
Consider the symplectic 4-manifold which is a product of two 2-spheres
of different areas. We will show that there are disjoint Lagrangian
tori T_1 and T_2 in this four-manifold which are separately displaceable
by Hamiltonian isotopy, but such that their union is not displaceable.
This talk reports on joint work with Cheuk Yu Mak.
