# On a construction of stable maps from 3-manifolds into surfaces

**Authors:** Gakuto Kato

arXiv: 2508.21337 · 2025-12-11

## TL;DR

This paper presents a visual method to construct stable maps from 3-manifolds, specifically from the 3-sphere and other closed orientable 3-manifolds, into surfaces, with controlled singularities and fiber types.

## Contribution

It introduces a new visual construction technique for stable maps from 3-manifolds into surfaces, linking links in the 3-sphere to specific stable map properties.

## Key findings

- Constructed stable maps with no cusp points
- Set of definite fold points coincides with the given link
- Obtained stable maps into the 2-sphere for all closed orientable 3-manifolds

## Abstract

For any link in the $3$-sphere, we give a visual construction of a stable map $f$ from the $3$-sphere into the real plane enjoying the following properties; $f$ has no cusp point, the set of definite fold points of $f$ coincides with the given link and $f$ only has certain type of fibers containing two indefinite fold points. As a corollary, we obtain a similar stable map from every closed orientable $3$-manifold into the $2$-sphere.

## Full text

_Full body text omitted from this summary view._ Fetch the complete paper as Markdown: https://tomesphere.com/paper/2508.21337/full.md

## Figures

16 figures with captions in the complete paper: https://tomesphere.com/paper/2508.21337/full.md

## References

19 references — full list in the complete paper: https://tomesphere.com/paper/2508.21337/full.md

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Source: https://tomesphere.com/paper/2508.21337