Elementary spectral invariants and three-dimensional Reeb dynamics

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1. Verfasser: Hutchings, Michael
Format: Preprint
Veröffentlicht: 2026
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author Hutchings, Michael
author_facet Hutchings, Michael
contents We survey various recent results on the existence and properties of periodic orbits of Reeb vector fields in three dimensions. We give an introduction to the "elementary spectral invariants" of contact three-manifolds, and we explain how they can be used to prove some of these results. (The remaining results can be proved using spectral invariants from embedded contact homology, of which the elementary spectral invariants are a simplification.) We then review the "alternative ECH capacities" of symplectic four-manifolds, and explain how these can be modified to define the elementary spectral invariants.
format Preprint
id arxiv_https___arxiv_org_abs_2605_12958
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Elementary spectral invariants and three-dimensional Reeb dynamics
Hutchings, Michael
Symplectic Geometry
Dynamical Systems
We survey various recent results on the existence and properties of periodic orbits of Reeb vector fields in three dimensions. We give an introduction to the "elementary spectral invariants" of contact three-manifolds, and we explain how they can be used to prove some of these results. (The remaining results can be proved using spectral invariants from embedded contact homology, of which the elementary spectral invariants are a simplification.) We then review the "alternative ECH capacities" of symplectic four-manifolds, and explain how these can be modified to define the elementary spectral invariants.
title Elementary spectral invariants and three-dimensional Reeb dynamics
topic Symplectic Geometry
Dynamical Systems
url https://arxiv.org/abs/2605.12958