| Title: | Which cubic graphs have quadrangulated spherical immersions? |
|---|
| Authors: | ID Abrams, Lowell (Author)
ID Berman, Yosef (Author)
ID Faber, Vance (Author)
ID Murphy, Michael (Author) |
|---|
| Files: |  AMC_Abrams,_Berman,_Faber,_Murphy_2026.pdf (1,05 MB)
MD5: 4E61A1F6F0A6E46EC6F7A48E8A943A47
|
|---|
| Language: | English |
|---|
| Work type: | Article |
|---|
| Typology: | 1.01 - Original Scientific Article |
|---|
| Organization: | ZUP - University of Primorska Press
|
|---|
| Abstract: | We consider spherical quadrangulations – spherical embeddings of multigraphs, possibly with loops, so that every face has boundary walk of length 4 – in which all vertices have degree 3 or 4. Interpreting each degree 4 vertex as a crossing, these embeddings can also be thought of as transversal immersions of cubic graphs which we refer to as the extracted graphs. We also consider quadrangulations of the disk in which interior vertices have degree 3 or 4 and boundary vertices have degree 2 or 3. First, we classify all such quadrangulations of the disk. Then, we provide four methods for constructing spherical quadrangulations, two of which use quadrangulations of the disk as input. Two of these methods provide one-parameter families of quadrangulations, for which we prove that the sequence of isomorphism types of extracted graphs is periodic. We close with a description of computer computations which yielded spherical quadrangulations for all but three cubic multigraphs on eight vertices. |
|---|
| Keywords: | spherical embedding, immersion, quadrangulation |
|---|
| Publication date: | 12.02.2026 |
|---|
| Publisher: | Založba Univerze na Primorskem |
|---|
| Year of publishing: | 2026 |
|---|
| Number of pages: | 32 str. |
|---|
| Numbering: | Vol. 26, no. 2, [article no.] P2.05 |
|---|
| PID: | 20.500.12556/RUP-22784  |
|---|
| UDC: | 51 |
|---|
| eISSN: | 1855-3974 |
|---|
| DOI: | 10.26493/1855-3974.3080.a2f |
|---|
| Publication date in RUP: | 17.03.2026 |
|---|
| Views: | 204 |
|---|
| Downloads: | 5 |
|---|
| Metadata: |    |
|---|
|
:
|
Copy citation |
|---|
| | | | Average score: | (0 votes) |
|---|
| Your score: | Voting is allowed only for logged in users. |
|---|
| Share: |  |
|---|
Hover the mouse pointer over a document title to show the abstract or click
on the title to get all document metadata. |
