University of Arkansas Topology Seminar: 3/3/2022

Speaker: Orsola Capovilla-Searle

Title: Infinitely many planar exact Lagrangian fillings and symplectic Milnor fibers

We provide a new family of Legendrian links with infinitely many distinct exact orientable Lagrangian fillings up to Hamiltonian isotopy. This family of links includes the first examples of Legendrian links with infinitely many distinct planar exact Lagrangian fillings, which can be viewed as the smallest Legendrian links currently known to have infinitely many distinct exact Lagrangian fillings. As an application we find new examples of infinitely many exact Lagrangian spheres and tori 4–dimensional Milnor fibers of isolated hypersurface singularities with positive modality.



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