Lagrangian Surplusection Phenomena
Abstract
Suppose you have a family of Lagrangian submanifolds and an auxiliary Lagrangian . Suppose that intersects some of the more than the minimal number of times. Can you eliminate surplus intersection (surplusection) with all fibres by performing a Hamiltonian isotopy of ? Or will any Lagrangian isotopic to 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.
Cite
@article{arxiv.2408.14883,
title = {Lagrangian Surplusection Phenomena},
author = {Georgios Dimitroglou Rizell and Jonathan David Evans},
journal= {arXiv preprint arXiv:2408.14883},
year = {2024}
}