ℓ1-Embeddability of Regular Quadrilateral Maps on the Torus and the Klein Bottle
Abstract
A connected graph is called ℓ1-embeddable if its shortest-path metric admits an isometric embedding into the ℓ1-space; equivalently, in the finite case, it admits a scale embedding into a hypercube. This paper gives a complete parameter-level classification of ℓ1-embeddability for regular quadrilateral maps on the torus and the Klein bottle. We treat the two toroidal families Qk,m,r and Qk,m,e, obtained from suitable identifications of finite square grids, and, using the known isomorphisms among Klein-bottle quadrilateral maps, the three essential Klein-bottle families Qk,m,a, Qk,m,b, and Qk,m,h. The ℓ1-embeddable toroidal maps are exactly Qk,m,0, Qk,2,1, Qk,1,e, Q5,2,e, Q2i,2,e (i≥ 2), and the ℓ1-embeddable Klein-bottle maps are exactly $ Q_{2,2,a}, Q_{4,2,a}, Q_{2,m,b}, Q_{1,2,h}.$ All other members of these five families are not ℓ1-embeddable.
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BibTeX
@misc{wang2026ℓ1embeddability,
title = {{$\ell_1$-Embeddability of Regular Quadrilateral Maps on the Torus and the Klein Bottle}},
author = {Guangfu Wang and Wenchao Cong and Chunxiao Xu},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.03770},
eprint = {2610.03770},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.03770},
}
RIS
TY - UNPB
TI - ℓ_1-Embeddability of Regular Quadrilateral Maps on the Torus and the Klein Bottle
AU - Guangfu Wang
AU - Wenchao Cong
AU - Chunxiao Xu
PY - 2026
DA - 2026/10/01
PB - arXiv
DO - 10.48550/arxiv.2610.03770
UR - https://arxiv.org/abs/2610.03770
AB - A connected graph is called ℓ_1-embeddable if its shortest-path metric admits an isometric embedding into the ℓ_1-space; equivalently, in the finite case, it admits a scale embedding into a hypercube. This paper gives a complete parameter-level classification of ℓ_1-embeddability for regular quadrilateral maps on the torus and the Klein bottle. We treat the two toroidal families Q_k,m,r and Q_k,m,e, obtained from suitable identifications of finite square grids, and, using the known isomorphisms among Klein-bottle quadrilateral maps, the three essential Klein-bottle families Q_k,m,a, Q_k,m,b, and Q_k,m,h. The ℓ_1-embeddable toroidal maps are exactly Q_k,m,0, Q_k,2,1, Q_k,1,e, Q_5,2,e, Q_2i,2,e (i≥ 2), and the ℓ_1-embeddable Klein-bottle maps are exactly $ Q_{2,2,a}, Q_{4,2,a}, Q_{2,m,b}, Q_{1,2,h}.$ All other members of these five families are not ℓ_1-embeddable.
ER -