Lagrangian Surplusection Phenomena
Suppose you have a family of Lagrangian submanifolds $L_t$ and an auxiliary Lagrangian $K$. Suppose that $K$ intersects some of the $L_t$ more than the minimal number of times. Can you eliminate surplus intersection (surplusection) with all fibres by performing a Hamiltonian isotopy of $K$? Or will any Lagrangian isotopic to $K$ surplusect some of the fibres? We argue that in several important situations, surplusection cannot be eliminated, and that a better understanding of surplusection phenomena (better bounds and a clearer understanding of how the surplusection is distributed in the family) would help to tackle some outstanding problems in different areas, including Oh's conjecture on the volume-minimising property of the Clifford torus and the concurrent normals conjecture in convex geometry. We pose many open questions.
Authors
- Georgios Dimitroglou Rizell (ORCID: https://orcid.org/0000-0003-4765-4979)
- J. D. Evans (ORCID: https://orcid.org/0000-0001-9000-8484)
Publication Details
- Journal
- Symmetry Integrability and Geometry Methods and Applications
- Published
- 2024-12-06
- DOI
- https://doi.org/10.3842/sigma.2024.109
- Primary Topic
- Geometric and Algebraic Topology
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Knut och Alice Wallenbergs Stiftelse
- Vetenskapsrådet
- Engineering and Physical Sciences Research Council