Multisections of $(m+3)$-dimensional $m$-spun $3$-manifolds

TL;DR

This paper constructs multisections for a class of high-dimensional manifolds, extending spun 3-manifolds to all dimensions and providing numerous examples of multisected manifolds.

Contribution

It generalizes the concept of spun 3-manifolds to all dimensions and constructs multisections for these manifolds, offering new examples in high-dimensional topology.

Findings

Constructed multisections for m-spun 3-manifolds in all dimensions

Provided multisection diagrams for these manifolds

Generated infinitely many non-diffeomorphic multisected manifolds

Abstract

A multisection, or $n$-section, of an $(n + 1)$-dimensional manifold is a decomposition of this manifold into $n$ $1$-handlebodies of dimension $n+1$, such that all these handlebodies intersect along a closed surface, and every subcollection of $k$ handlebodies intersects along an $(n - k + 2)$-dimensional $1$-handlebody. This concept, due to Ben Aribi, Courte, Golla and Moussard, generalizes to any dimension Heegaard splittings and Gay and Kirby's trisections. If any $(n+1)$-manifold admits a multisection for $n \leq 4$, there are yet no general existence results for $n \geq 5$. In this article, we provide a class of examples of multisected manifolds in all dimensions. We extend the concept of $4$-dimensional spun manifolds to any dimension, and construct multisections and their associated multisection diagrams for the class of $m$-spun $3$-manifolds, of dimension $m+3$, for any $m$. This allows us to give infinitely many examples of non-diffeomorphic multisected manifolds, in all dimensions.