Ideal Triangulations and Once-Punctured Surface Bundles
Abstract
A well-known result of Walsh states that if is an ideal triangulation of an atoroidal, acylindrical, irreducible, compact 3-manifold with torus boundary components, then every properly embedded, two-sided, incompressible surface is isotopic to a spun-normal surface unless is isotopic to a fiber or virtual fiber. Previously it was unknown if for such a 3-manifold an ideal triangulation in which a fiber spun-normalizes exists. We give a proof of existence and give an algorithm to construct the ideal triangulation provided the 3-manifold has a single boundary component.
Cite
@article{arxiv.2505.21798,
title = {Ideal Triangulations and Once-Punctured Surface Bundles},
author = {Birch Bryant},
journal= {arXiv preprint arXiv:2505.21798},
year = {2025}
}
Comments
v2 fixed typographic and orthographic errors. Improved clarity of prose throughout. Added Question 5.7 concerning virtual fibers. Included new figure of crushing map: Figure 2. Included additional acknowledgement of genesis and funding